Yokai Academy, a private campus that exist in a secret plane away from the human world. In this campus, however, lies a secret that only three of the students know. We see two of our heros walking their way to class, one average looking boy, and the other a pink haired boy. One a human, and the other a dragon, that they swore that day to keep it a secret from the others for his safety. As they walk, they see most of the boys ahead looking at in amazement at a bright light. It reveals to be Moka, the pink haired vampire that also promised to keep the secret of Tsukune.

Natsu: "Hey Moka, over here!" he waved his hand to get the girl's attention. As she turns around, she notices Tsukune and Natsu walking together and runs to tsukune, hugging his arm.

Moka: "Morning, Tsukune!" she happily said as the boys around them were shocked at first, but then it quickly turned to jealousy as Tsukune could feel the envy from them. Later, the three were sitting near the back entrance of the school as they were discussing how tsukune would fit in without anyone noticing that he's the only human.

Moka: "Tsukune, I think it must be lonely to be the only human, but I'll be there for you. If there's anything we can do, just tell me or Natsu, ok?" saying to Tsukune to reassure him.

Natsu: "Yeah! Just tell me who to beat up and I'll do it free of charge." Tsukune was a bit worried when Natsu said that, but he knows that he's a good friend to trust, despite his methods of helping.

Tsukune: "You guys… why are you doing this for me, despite knowing that I'm a human?" he asked, unsure of the their real motives.

Natsu: "For a really weak human, you're pretty cool. And despite your average looks, you seem very brave." making Tsukune feel a little ashamed of his strength compared to theirs.

Moka: "Why? Well it's because I…" she then got closer to Tsukune, only to feel thirsty and suck his blood, catching Tsukune off guard and yelling in pain. As Tsukune was running in circles bleeding out, Natsu came up to Moka and smacked her upside the head reminding

Natsu: "At least give a warning when you do that, he's not used to it yet." he reminded Moka as he came up to her and smacked her upside the head.

Moka: "Sorry, it's just because your aroma is suddenly so good I suddenly…" saying as she felt (kinda) bad and apologizes.

Tsukune: "But i'm not your food!" yelling while running in fear that Moka will suck his blood dry.

Natsu: "Great, you scared him off, when we find him, you need to apologize, ok? Because neither of us want him to end up all skin and bones." he asked Moka as she sadly agrees and the two start looking for him.

(Forest)

Tsukune walked into the woods while holding his bite wounds, thinking if Moka was only around him just for his blood. As he walked deeper, he notices shadows on the floor coming closer to him, circling around him looking ready to pounce him. Tsukune was scared out of his wits when suddenly he hears a plea for help.

?: "S… some… one", Tsukune was startled by the voice when he suddenly notices a girl limping in pain. This girl had short light-blue hair tied around with a purple scrunchie, brown eyes and her uniform consisting of a white long-sleeved shirt, a yellow sweater vest, a large, red neck ribbon and a brown skirt. "Help me please, I just started suddenly feeling dizzy and…" Before she could finish her sentence, Tsukune helped her up and helped her to the school infirmary, with the girl thanking him for his help. They start to walk to the infirmary when the blue haired starts to breath heavily saying,

Kurumu: "My… chest just starts hurting all of a sudden…" Then she starts to rub her (huge) breasts onto Tsukune's chest, making his face as red as a tomato. "Hey, look into my eyes Tsukune… I'm Kurono Kurumu. Please be a good friend to me, ok?" As they look into each other's eyes, Tsukune starts feeling hypnotically attracted to her as he suddenly starts hugging her tightly. "Kyaaaa! What are you doing!?"

Tsukune; "Wait, what am I doing?" he thinks to himself while Moka and Natsu find Tsukune and another girl hugging and smiling at each other.

Moka: "What…? Tsukune?"

Bus Driver: "Hehe… Aren't you the popular one… But be careful of women, boy." he suddenly appears next to them and scaring them, smoking a cigar and puffing in the air.

Moka: "Who are you!?"

Bus Driver: "I'm just your average passerby, letting you folks off with a little warning. I'd keep my eye out for that one, that ain't no ordinary girl." he starts to walk off into the mist of the forest, not looking back as he disappears in the mist.

(Hallway)

Later inside the academy building, as the other students pass by, Moka and Natsu were leaning the wall, thinking who was that mysterious girl with Tsukune earlier.

Natsu: "The nerve of that kid, being close to a strange girl like that. Can you believe it! He ditch us for some arm candy!" pissed at what Tsukune did to them as Moka looked down to the floor, asking Nasu a question.

Moka: "They really… looked like lovers, didn't they? Totally all over each other like that… What's wrong with me? Why am I taking this as a shock? Was is because of this morning?" she said with a regretful look on her face.

Natsu: "When I see his face again, I'm gonna give him a piece of my… *sniff* *sniff* *whisper to Moka* Hey, someone's been following us." as Moka gave him a confused look, the rosary starts to talk to her.

Rosary: "He's right, this isn't the time to feel down. You two are being targeted." Moka looks around to see who spoke when another voice comes along.

Kurumu: "You… are a vampire right? That's at least what the rumors say, Moka Akashiya!" proclaiming while sitting on the rails of the stairs ahead. She jumps down to their level as the boys start to blush at her appearance, looking at all of the curves on her body. "I am the succubus Kurono Kurumu, and I… have come to defeat you."

Natsu: "HA, you couldn't even lay a finger on her, since I'm here. Besides, how can you fight with that huge butt on your chest?" he questioned as this angered Kurumu even further.

Kurumu: "I can't stand it anymore! You two are insufferable, especially you Moka. You're in the way of my great plan!" They both question about the plan as Kurumu explained that her plan was to make every male student at the academy her slave. She called it the yokai academy harem transformation plan, and as she revealed her secret, Moka and Natsu looked dumbfounded by her ridiculous plan. "My plan was perfect! I should have had every guy at this academy a slave to my beauty right from the start. However, the guys are dreaming about you instead of me! I'm not letting you get away with this, I could never lose in a battle of feminine charm!" Kurumu challenging Moka to a battle of beauty, the students feeling the heat of two beauties. Natsu scoffs of the threat from Kurumu, then looks at him with her plan coming to motion.

Kurumu: "...And I'll start by taking you friend, Moka." Kurumu walks up to Natsu flirtatiously and looking him in the eyes, using her 'charm' to win him over to her side. "So, now what do you have to say about my chest?"

Natsu: "That they still look like a huge butt." Kurumu was shocked as to why her charm didn't work on him as she tried again, now confusing Natsu as to what she's trying to do exactly.

Kurumu: "No matter, if I can't take your idiot of a friend, I'll prove I'm better than you by stealing Tsukune from you!"

Moka: "Wait stop! Tsukune doesn't have anything to do with this." Moka tries to reason with Kurumu, but Kurumu isn't not buying her bluff.

Natsu: "Yeah! And I'm not an idiot." Kurumu ignores his comment and continues.

Kurumu: "I knew it from the moment we were close earlier. He has a really good scent, just like a Human! You're using Tsukune as 'food' aren't you?" Before Moka could reply, Tsukune comes and calls Moka to apologize. But Kurumu hugs him and rubs her breast against his chest, trying to get Tsukune to herself.

Tsukune: " Wh-why are you here Kurumu? I came to apologise to Moka and-!" As Tsukune turns to see the two, they were livid as Moka had a dark aura around her, and Natsu had his arms crossed, head and shoulders covered in fire.

Moka: "What's with you? You're worried about someone, and yet you make such a happy face."

Natsu: "Yeah, you seem very friendly with someone you've just met. Who do you take us for?"

Tsukune's face went pale as he saw not one, but two people that were going to kill him. Moka shakes off the anger to warn Tsukune that Kurumu is tricking him into becoming her slave. Kurumu acts dizzy in front of Tsukune, only to catch her and use her charm to control him, now being mind-controlled once again. Moka tries to convinces Tsukune one more time.

Moka: "Please believe me. That girl is dangerous Tsukune! You're going to be eaten by her!"

Tsukune: "Oh really! Aren't you the one sucking my blood Moka?" Moka was heart broken as in seconds she runs off, bawling her eyes out, and Natsu looking more mad than before. But before Tsukune could run after her, Natsu throws a straight right to his face, throwing him a good 30 feet away. Kurumu has shocked as see to how far tsukune had flown from Natsu's less than serious punch. As Tsukune got up from the hit, Natsu gave him a nasty glare before he ran off, chasing after Moka.

(Infirmary)

Kurumu: "I did it, I finally did it! I made that annoying Moka cry. That pitiful face, I can't take it!" As she thinks of her victory on the infirmary bed. While she's holding in her excitement, Tsukune also thinks of why would he say something like that to Moka and why did Natsu have to punch him so hard. Now that Moka is out of the way, Kurumu has to take her chance in which she suddenly hugs Tsukune, his face in between her breast. This takes Tsukune by surprise as Kurumu starts to talk, "You're sad, aren't you Tsukune? Don't worry, Kurumu will make it up to you and make you feel all better."

…

In the back of the academy, Natsu finally catches up to Moka, sitting all alone with tears still running down her face. He sits down next to her, trying to think of something to say, but Moka speaks up first,

Moka: "I wonder… what am I to Tsukune? Do I really just want his blood? I don't know what to do Natsu?"

Natsu: "Forget him, a guy who makes any woman cry is unforgivable. But don't worry, it could be just the two of us, like a dynamic duo!" he tells Moka this smiling at her, it soon goes away when she's still isn't smiling at all. They both went silent, looking at the ground, when suddenly the rosary starts talking to Moka again.

Rosary: "Naive one, Tsukune is just being manipulated by a charm. It's a work of sorcery which turns the opposite sex into your slave." Moka was surprised to hear a voice as it continues, "I am another you. I'm using the rosary as a medium to talk to you within your deep psyche. That succubus is going to kiss Tsukune, which then he'll be doomed to become her slave for all eternity. Now hurry before it's too late."

Moka shoots up from her spot, explaining to Natsu that they got to go save Tsukune from Kurumu before he becomes her slave. Natsu, on the other hand, was angered to hear this from Moka.

Natsu "What!? You want to go save him, after what he's put you through! After what he's done, I think he deserves it!"

Moka: "Fine! I'll go by myself and save him from Kurumu!"

Natsu: "But why go through all the trouble!? He hurt you, didn't he!?"

Moka: "Because he's our friend! And because I… love him." she start to sprint off looking for Tsukune, leaving Natsu alone to think over if Tsukune really was his friend.

…

Back at the infirmary, Kurumu on top of Tsukune on the bed, taking her chance to finally take him all to herself. As Kurumu goes in for the kiss, Tsukune uses all of his strength to pull in Kurumu for a hug, avoiding the kiss and leaving Kurumu in shock.

Tsukune: "I'm sorry! I can't… There's someone I don't want to betray." he apologises to Kurumu, then getting push back by her, mumbling to herself.

Kurumu: "Why… why do you hate me so much? Is she so much better than me? And I did everything I could do for you! Even though some of the things I did were embarrassing, and now… I'm pissed!" Kurumu transforms into her true succubus form, her ears pointed, nails as long as daggers, and sprouting a pair of wings and a tail. "I'm going to destroy everyone that has anything to do with her!" As Kurumu lunges at Tsukune, who is screaming in fear, Moka comes barging to the door, pushing Kurumu with her vampire strength out the window.

Moka: "Tsukune, run while there's still time!" she pleaded with Tsukune while still assessing the situation.

Tsukune: "Wait a minute here, I have absolutely no clue what's going on!"

Moka: "I'm sorry you got wrapped up in this Tsukune, that girl is a succubus. It seems she wants revenge on me, and in order get it, she's targeted you!"

Kurumu got up from out the window and challenges the two outside to kill them. As the two got outside, Moka pleades with Tsukune to take off the rosary from fer chest, releasing the seal and the other Moka. As the two were distracted, Kurumu took this chance and dives down, only to miss them and cutting the trees in the way like butter. As Tsukune quickly tugs on the rosary, the chain doesn't break, hence their chances to fight back are slim to none.

Tsukune: "Ah, it won't come off!? I can't take the rosary off, it won't even budge!" he cries out as he tugs it harder and harder out of fear.

Kurumu: "Hahaha, stupid monster, all you have is strength! It looks like Tsukune was just a burden to you. Now just give up and die!" Kurumu going for another dive attack as Moka suddenly holds Tsukune close in her arms.

Moka: "Tsukune is my precious friend! It has nothing to do with his blood! If you're going to fight someone, just fight me!" she cried to Kurumu as her words fell onto deaf ears.

Kurumu: "Don't make me laugh, now say goodbye!" As Kurumu went for her final strike, a blur of pink jumps in the way and moves Moka and Tsukune out of harm's way. The three see who it was as he still had Moka and Tsukune being carried like luggage.

Natsu: "Looks like I made it in time. Glad you two aren't hurt, or dead yet. I guess you were right Moka, Tsukune is our friend, and I won't stand aside if someone hurts my friends!" exclaiming while he puts them down to the sidelines and faces Kurumu. "Your fighting me now, and I won't go easy just because your a girl."

Kurumu: "Likewise." replying as she got to the ground and throws a barrage of slashes at him, only for Natsu to dodge everyone of them. Tsukune and Moka were amazed as they saw Natsu dodging every attack thrown at him, like a leaf dancing in the wind. As Kurumu throws slashes and kicks, Natsu parrys her attack and throws a fire kick to her back.

Natsu: "What's wrong? You can keep up with me? How about losing the extra weight on your chest and start fighting me seriously." he told Kurumu as she gets angry and starts flying in the air.

Kurumu: "Enough! I'm going to end this right now! Say your prayers!" Kurumu goes for a final dive attack, ending this once and for all. As she dives to Natsu, he notices her eyes were fixated on something, or someone as she passes right through him.

Natsu: "Tsukune, Moka. Look out!" he cries to them as Kurumu's real targets being Tsukune and Moka. Tsukune looks and out of fear and courage, he reaches and rips Moka's rosary as the chain finally broke off, releasing the seal.

Moka: "No, the rosary came...off?" A flash of white light suddenly envelopes Moka, changing her appearance entirely. Everyone is feeling this sudden high power rise as Moka's hair changes from pink to white, growing fangs and claws, and her eyes change to a blood red. Kurumu feels threatened and starts to lose her edge.

Kurumu: "Don't mess around with me, there's no way I can lose! Us succubi seek a 'destined encounter' among the men we tempt. In order to keep our small species from dying out, we must carefully pick just one man from out of many to be our destined on. You got in the way of that, Moka Akashiya! I can't let you get in the way with that no matter what!" she goes in for another dive attack as the other Moka stands and extends her hand out.

Moka: "...So what are you going to do? You can't let me do this, so you dare bare your fangs at the like of me? … Know your place." Out of spite, Kurumu goes in for the attack, sees that Moka teleports behind her grabbing her tail and calling her attack too slow. Moka swings Kurumu around until she slams her to the ground, making a crater from the sudden impact. As Kurumu gets up from the impact, she sees Moka walking towards her saying, "Calm yourself, that attack was too straightforward. Am I too difficult for you? Though you act like a devil, you're just a naive little girl. I'll make it so you can never stand up to me again." Kurumu is crying in fear, then Tsukune walks in between them, stopping the one-sided fight in hand. "What is this? Move! Was this not the woman who not only tricked you, but tried to kill you?" Moka said as she was confused at his actions.

Natsu: "Moka's right, she doesn't deserve this pity after what she's done."

Tsukune: "...This is enough. I don't believe that Kurumu was actually doing this out of purely, bad intentions. It's just, I can't see Kurumu as being a bad girl at heart. Just like how the Moka right now is someone we can depend on." he says, trying to reason with the vampire and the dragon.

Moka: "Don't misunderstand, I just didn't want your blood to be stolen from me." she says as she reaches for the rosary in Tsukune's hand. Natsu couldn't believe that one person can have this much power, growing a little jealous of her. Moka notices the envy coming out of Natsu and starts to put on the rosary. "Until we meet again, you had better babysit the other Moka. And you, maybe someday I'll see what you're made of and challenge you to a duel."

Natsu: "It's a date then!" grinding, now having a new fighting partner. Moka then turns back to normal, falling into Tsukune's arms with a smile on her face.

(Walkway)

Tsukune: "What!? The Rosary started talking to you!?" he asked Moka with Natsu, walking on their way to school the next morning.

Moka: "Yeah… It's strange isn't it. Hey… if the time comes when the seal doesn't work anymore, would you still like me Tsukune?" she asked Tsukune, unsure of his answer.

Tsukune: "Of course I will! Even if you are a little scary and you suck my blood. To me, Moka is Moka, so it's all right!" Tsukune answering immediately to Moka's question, making both of them blush.

Natsu: "Oh brother…" he thinks to himself, feeling like the third wheel of the trio. Unknown to them, Kurumu surprises them with a 'good morning', scaring the trio from her (sudden) presence.

Kurumu: "Tsukune, I baked some cookies. Won't you eat them with me?" Kurumu shows the gang a tray of cookies in a nice hand basket, which makes Natsu's mouth water from the smell. Tsukune asks why are the cookies for him when Kurumu replies, "Oh, remember when I said I was searching for my life's one and only destined one? Well I've decided… It's you!" Tsukune was shocked to hear that it was him to be her destined one, which Kurumu makes a confident face towards Moka, telling her she still won't lose in a battle of love. As sparks fly from their glances of a love battle, Natsu tries to take some cookies while Kurumu is distracted. "Hey! These cookies are only for Tsukune, not for some dense idiot!" Kurumu catches Natsu in the act and punches him in the head, making a big, red bump on his head.

The three friends now have a new member, making them four, as their adventure ahead is only just beginning to unfold.