Story Thus Far: Tsuna has found out he's a very rare and desired madararui. Because of this he has to not only become a mafia boss, but marry one too! Since this discovery, he's gained a croc of tutor, Reborn, an Italian Stallion fiancee, Dino, a panther predator, Hibari, a catty right-hand man, Gokudera, and three friends, Ryohei the bear, and two dogs, Yamamoto and... Lambo? Lambo had told Gokudera a secret, that frustrated the cat. What could this mystery be...?

It was getting late and Ryohei and Yamamoto had already left, both had to get sleep in order to be alert enough in the next day to complete morning practices.

"You and Gokudera should get back to the mansion as well," Dino said, looking straight into Lambo's eyes and brushing a hand lightly against the boy's cheek.

Lambo grabbed onto Dino's other hand. "Aren't you coming with us?"

Dino leaned his forehead against Lambo's and intertwined his fingers with the boy's. "No, I'll be staying here one more time."

Lambo shut his eyes. "The house a bit empty without you. Defenseless too."

Dino's smile was very affectionate. Lambo could feel its warmth. "I'm sorry." The man said. "I'll come back tomorrow night, okay?"

"…okay."

They then broke apart and Lambo and Gokudera left together.

"Those two just now," Tsuna began. "had an atmosphere going."

Reborn nodded. "That's probably because Lambo is very precious to Dino."

"Is he his nephew or something?" Tsuna asked.

"Nope." Reborn answered nonchalantly. "You see, Dino is supposed to—"

"Reborn! Don't say that just yet! Besides, what if Lambo doesn't want anyone to know?" Dino huffed.

"It's all for his sake that you're keeping it a secret, right?" Reborn snorted. "But isn't your relationship with Lambo something you would want your bride-to-be to know?"

Tsuna's mouth widened a little as he had an epiphany. "Secret? Gokudera-kun got super mad at Lambo-kun this morning after Lambo-kun revealed some secret. Gokudera-kun didn't tell me what it was, but do you think it's the same thing you're talking about?"

Dino's eyes widened. "Lambo told Gokudera?" He seethed. "Gokudera must've been pissed."

"He was!" Tsuna said. He was about to mention how Gokudera beat on Lambo, but was afraid that Dino would get mad at Gokudera and Tsuna didn't want to make the relationship between the two males more strained than it had already become. "And if you think this secret is the same one that made Gokudera-kun so angry, then I would like to know what it is!" Tsuna said.

"…Are you sure?" Dino asked. "I feel that if you are going to become my bride then you have a right to know, but…"

"Come on," Reborn encouraged. "It's not like he'll tell anyone."

Dino gulped and nodded. "Okay. Let's go to your room."

Tsuna sat on his bed while Dino sat with his legs crossed on a futon that he had set out in Tsuna's room.

"When did you put that there?" Tsuna asked, almost afraid to hear the answer.

"Oh," Dino said. "A little after you left this morning! Maman found it in a closet and we laid it out together! It's an interesting experience of Japanese culture for me. Isn't a futon delicately sensual? Want to share it with me?" Dino said, lifting up his blanket and patting the empty space beside him.

"No, thank you." Tsuna replied decisively.

Dino let out a small laugh. "I didn't think so." His gaze then softened as well as his voice. "So… you want to know about Lambo and me?"

"Yes." Tsuna's answer was firm.

"Alrighty then." Dino said. "Where to start? I guess I'll begin by telling you I'm a horse, the last one."

"R-really?"

"I'm glad you're shocked. It's a pretty big deal. To be more specific, I'm a Maremmano, a heavy-seed which isn't good since that means I have a low reproductive level which makes smaller chances of horse babies."

"That's so sad…"

"It gets worse. You see, my legal father was a Mizuchi though my mother was a horse. This made them fear that they would not be able to have a horse child. They had several children and, in an attempt to preserve the race, my mother even had plenty of male and female lovers on the side. So, I have tons of siblings and half-siblings, all of whom are a part of the Cavallone, though I'm the only horse. But I was had from a Mizuchi woman that my mother impregnated, so as an illegitimate child who would not be accepted in the mafia world, they claimed that I was a production of my mom and dad. Just to let you know, I took Gokudera in because our stories were so similar. He would never tell me about his life himself, but I'd found out what happened to him after being told at a Mafioso-exclusive party. When I heard about this kid who had run away after his mother's death, I went out looking for Gokudera, initially planning to take him to his original home, but we got so attached to him, we decided to keep him."

"Does Gokudera-kun know that?"

"Lambo probably told him."

"How does Lambo know?"

"He was with me when I first got Gokudera. In fact, when I said 'we decided to keep him' I meant Lambo and I. Well, I guess I should backtrack a bit. I skipped some important parts."

"Don't get distracted so easily…"

"Heh, sorry. Okay! So, one day, my mother, who was boss of the Cavallone at the time, was killed in a gunfight. I was young, so one of my siblings was the one to become a temporary boss. From that point onward I was the last horse left and a kid being trained by Reborn in order to become a mafia boss."

"Eh? By Reborn?"

"Yep. Like the Returners to Ancestry rule within the Vongola, a horse is meant to be boss of the Cavallone, but that is only a part of what has to do Lambo and I."

"Go on…"

"As soon as I became boss, my job had become to produce a successor. If I didn't start then, there were chances of never finding a way to make one. That's when I heard some news that the Bovino were selling a kid."

"Selling a kid...? That's sick!"

"They were selling him for a high price because he was very special. He, like me, was the last of his kind. The Bovino were poor so they had to sell an eight year-old in order to stay out of debt. Now, this meant a lot since the rule of the Bovino is that a bull is meant to be leader. The kid they were selling was the last bull. I was so happy to know that there was another ungulate out there. It didn't take me long to realize that him and I must've been the only ones. I bought that bull, who is Lambo, and raised him to know that his sole purpose is to have my children."

Tsuna slapped Dino. The smack was hard and loud.

"You're sick!" Tsuna shouted. "You bought a kid and taught him that his only reason for being is to have babies! That's disgusting!"

Dino held his throbbing cheek and looked down, unable to look back into Tsuna's eyes. "Lambo and I are the last ungulates in the world. We are each other's only chance at preserving our races. I promised him that we would only do it when he was ready. I also provide him with everything he wants, no matter how expensive. I protect him, lying and saying he is a dog. Rarity to madararui is like an aphrodisiac. The rarer one is, the more sex appeal they have. I have to make sure no one defiles Lambo before me."

Another slap. "You bastard! That's messed up!"

"When I told Lambo," Dino started slowly. "about overhearing Gokudera's story, he was the one who encouraged me to look for him and to keep Gokudera since I thought it'd be best if Lambo had a playmate. I'm not a bad guy. It's just… Overall, you and Lambo are my best options to save my species. Understand, Tsuna, that with Lambo I can wait since I have brought him up with the intention of him bearing me children, but with you I can't waste time since several people have their eyes on you."

Tsuna pushed Dino down and began screaming in his face, "Don't you get that you're a jerk! I can't believe you! How are you supposed to just ask someone to have your kids like that! And… wait, hold on…" Tsuna faltered in his rant making Dino lift an eyebrow. Tsuna's face flushed. "Wait! Wait! Wait! What am I talking about? This is all stupid! Men can't have babies!" He put his hands on his hips and laughed at his own stupidity. "Here I was getting worked up over nothing!"

"Oi, Tsuna," Dino said. "If it's madararui, men can impregnate men and women can impregnate women."

Tsuna froze and shuddered again. "A-ah… I see… How is that possible?" He shrieked.

A glint flashed in Dino's eye. "Do you really want to know?"

Tsuna felt a chill run down his spine. "N-No... probably not…" The images he had of himself giving birth nearly made him vomit. Once he recovered from his utter disgust, he thrust an accusing finger in Dino's face. "Either way, you need to get out! Pervert! Pedophile!"

Dino grabbed onto Tsuna's wrist and pulled the boy into his lap. "Now, now, settle down, retrograde." He hugged onto the boy and emitted his seductive pheromones. "I don't want to use your ignorance to my advantage, but I will if—" Suddenly the body he was holding onto was unconscious, tiny, and furry. He held Tsuna's Soul's Appearance in front of him. "Geez, Reborn needs to hurry and train you. If you get like this just from my pheromones, then how are we ever supposed to have sex?"