Despite losing all his energy, Kuwabara unleashes his last drop of power and attacks again with his spirit sword, but once again Byako absorbs the energy, leaving Kuwabara down unconscious. Now Byako is about to smash Kuwabara with his humongous feet, but suddenly he begins to feel something wrong. It seems like what Kuwabara planned before has finally taken effect. Byakko absorbed too much energy for his body to take, and with this Byako explodes and he falls unconscious to the pit down below to his demise. Kuwabara faints from exhaustion.
That it turns out Byako survived his fall from the pit and has regained his composure. He challenges again the group to another showdown. As Yusuke attempts to attack Kuwabara suddenly stops him, saying this is his fight, and what he started must be finished. Nezuko decided to take on against Byakko knowing that Kuwabara is too weak to fight.
"Mmm..." Nezuko growled.
"No, Nezuko, you stay back. I can handle this myself." Kuwabara protested.
Bravely Kuwabara jumps off to face Byako one more time, but the stone he jumped on suddenly breaks... and a horrified Kuwabara catches his breath on almost falling to his death in the sea of lava.. he removes his shirt and prepares for the battle and unleashes his spirit sword one more time. But Byakko has something new to show, and he spits out a devastating fireball for Kuwabara. Kuwabara was about to counter with his sword but Kurama suddenly butts out saying he must avoid the attack. He does and realizes the ball disintegrates anything that touches it. With this, Kuwabara avoids every ball Byako fires, destroying each time the stepping stones all over. Now there are only two stones left, the stone where Byako waits, and the stone where a shocked Kuwabara stands.
Kuwabara releases a mighty punch that nails Byako in the jaw and knocks him out of the stone and down into the lava.. however, his punch was too strong he couldn't control himself and he too fell. The three are in shock at how Kuwabara sacrificed himself to beat Byako but just then we hear Kuwabara's scream.. he didn't fall! he's dangling just below the stone and yells for help. Another lucky break for Kuwabara.. so finally they beat Byako and they continue to face the rest of the demons.
The group reaches a room with 15 doors to choose from. Kurama warns them that they must be aware because only one door leads to the right path, and there are no second attempts to choose another door, and unavoidable traps lie on the wrong doors. Kuwabara, having the highest spiritual awareness among them, is chosen by Yusuke to decide which door they should take. He chooses the second door to the left, stating that there is something big behind the door.
He opens the door and got scared when he saw a tiny rat as Nezuko sweatdropped at how scared he is of a small creature scurrying away. They continue towards the path Kuwabara has chosen, and they find themselves in front of a blue door with dragon statues standing on each side. Judging from the statues and the odor, Kurama confirmed that the next Saint Beast they're going to encounter is the blue dragon. Suddenly the door opened by itself and they entered the room which is shrouded by fog. The next Saint Beast shows himself and introduces himself as Seiryu, the blue dragon.
Suddenly Seiryu announces that they have another guest, and came into the room through the door behind them is Byakko, still alive after falling into the sea of lava. He is asking for Seiryu's help, but he ignores his pleas and freezes him with his ice technique, and pulverizes him. He further insults him by telling him that he is just a weapon, not a friend, and spits on his face. Before Byakko dies the last tear formed in his eyes, fuelling Nezuko's anger against Seiryu, but Hiei stops her and tells her to save her anger for their leader.
Hiei then said, "I can't let the soon-to-be bride get in harm's way." The response from Hiei surprised Nezuko a little when he didn't want her to get hurt if she fought against Seiryu.
"I see that the bride has arrived to be involved in this well. Let's see if you're bound to make it out of here alive." Said Seiryu.
Hiei steps forward and throws his cloak to cover Byakko's head. Seiryu chuckles a bit and states that he finds it amusing that Hiei seems to feel sympathy for Byakko. Kurama then tells Yusuke that in times before he has seen Hiei act with similar cruelty, but something about Byakko's death enraged him, and he had never seen Hiei start a fight using such an extraordinary amount of spirit energy.
Before their battle, Seiryu tries to recruit Hiei and join them as a Saint Beast, but he refuses and Seiryu makes the first move, and Hiei draws his sword and deflects his attack with a barrier made of his spirit energy. Seiryu continues his assaults using his ice technique, but Hiei's extraordinary speed allows him to dodge Seiryu's attacks, freezing the room in the process. Eventually one of Seiryu's attacks managed to freeze Hiei's left leg, thus greatly decreasing his speed. Seiryu then insults him, telling Hiei to beg for mercy as he prepares his next attack. Before Seiryu's next attack could land on him, Hiei thrusts his sword on the ground and plunges into Seiryu, and as the two clashes, Hiei's right leg and left arm are frozen, while Seiryu seems to have the upper hand and appears to be unscathed until Hiei laughs and proves that his ice technique was ineffective against him. Seiryu then feels a small amount of blood trickle down from his head, and as the cuts reveal themselves he meets his painful end.
They paced over to Hiei as they seemed impressed that Hiei fought while the ice in the room started to melt away.
"Shortys a lot cooler than I thought!" Kuwabara exclaimed.
"You made french fries out of that guy!" Chimed Yusuke.
"Hiei how many times did you cut him?" Kurama asked.
"Only sixteen, "Hiei replied.
"Sixteen? Damn it, and here I could only keep track of seven or eight." Yusuke said.
"That's nothing meager. After the first hit, I only saw flashes of light." Kurama said.
"I couldn't even see the flashes!" Kuwabara groaned.
"Mmm! Mng!" Nezuko muffled.
"Well, I guess Nezuko seem to have counted it while watching the fight. Is that right?" Kurama inquired.
Nezuko nodded, "Mmm!"
Nezuko softly clapped as she went over to the cloak that covered Byakko's head as it disappeared. She returned it to Hiei staring up at him with a soft expression. As Hiei took the cloak from her to put it back on his body, he felt Nezuko petting his head again only this time he didn't remove it. There was something about Nezuko he wanted to find out for himself and that includes asking her after they are through with the mission.
"Man, this isn't good. If you use those moves the next time we fight I'm gonna be screwed. " Yusuke lightly chuckled.
Hiei turns his heel replying, "Maybe."
"I thought for sure he was going to say-"Well of course you fool!" Kuwabara mimicked Hiei's monotone voice. Nezuko silently laughs under her muzzle as she reached up to Kuwabara standing on her tippy toes giving him a head pat.
"Hiei is going through a tricky challenge," Kurama said.
Nezuko, Yusuke, and Kuwabara looked up at him with a concerned expression, "It appears he's beginning to like you both." The three looked over at Hiei to see that he was starting to like them the more they were cooperating.
Suzaku plays the Makai Whistle, altering the attention of the insect-possessed humans towards Keiko.
Yusuke, Kuwabara, Kurama, Nezuko, and Hiei rush into the next part of the castle as they reach the final chamber where Suzaku awaits. Botan calls Yusuke and tells him the situation and Suzaku's plan to capture Keiko.. but their conversation is rudely interrupted by the possessed people and together they run to an exit.
On the other hand, Yusuke and the gang are stopped by hundreds of zombies, but then Hiei thinks of a plan, and Kuwabara, Kurama, Nezuko, and Hiei worked together and formed a bridge for Yusuke to jump into the nearby entrance to the final chamber. They accomplish the job, and Yusuke runs off to face Suzaku one-on-one as the four finish off the zombies.
But Nezuko stares at the zombies ahead as her soft expression changed to anger and she glanced up at the chamber that Yusuke climbed inside.
"Nezuko! Where are you doing?" Kuwabara inquired.
As Nezuko runs just charges straight towards the zombies clawing each of them as she jumped on one and another's head. Then she started running on the wall climbing inside the entrance of the chamber to leave the three behind.
"S-She left us?!" Kuwabara shouted.
"She's going to help Yusuke that's why. She refused to let him go on his own and therefore she is protecting her." Kurama said.
"Hn," Hiei grunted.
While Nezuko ran inside to find Yusuke quick and fast since Suzaku played the Makai whistle to make the humans hurt Keiko. When she managed to catch up to get to Yusuke who was standing face to face against Suzaku. As the two were discussing something Suzako noticed Nezuko standing there behind Yusuke.
"Well, it seems my bride has finally come at last," Suzaku said.
Yusuke turned around with his eyes bulging out, "Nezuko! You should be fighting with the others."
"Seems she didn't listen because she wanted to come to see me." Suzaku implied.
"Heh, you think she's into a guy like you? Your not her type." Yusuke protested.
Suzaku knitted his eyebrows clenching onto the whistle, "Who are you to judge?"
"Enough about this romantic stuff. I came here to take that damn whistle and we're going to fight right here and right now." Yusuke demanded.
"Let's see how long you can fight against me."Suzaku declared.
"Nezuko, I don't need your help on this one. I can handle this on my own." Yusuke told the demon girl as she merely nodded to stand back and watch the fight between two men.
Yusuke sees in a widescreen Botan and Keiko being chased by possessed people. With this scene, Yusuke becomes enraged and decides to take back the flute by brute force, and he starts to attack with a barrage of punches. However, Suzaku blocks every punch with only one hand, while the other continues to hold the flute which he plays. So Yusuke decides to finish things quickly and unleashes a devastating rei gun, however, Suzaku is prepared for the situation. He quickly deflects the rei gun off and destroys part of the chamber. Yusuke gets shocked at how powerful Suzaku is because even with his intense training with Genkai Suzaku was able to swat his rei gun aside. Then Suzaku decides to take on the offense, and he raises his hand a lightning bolt strikes him - then his power as a lightning-demon arises and he attacks Yusuke with an enormous lighting fist - Yusuke was able to dodge it, but the force of the fist was so powerful it electrified him and knocked him down.
Nezuko wasn't sure if she should just stand there and do nothing. She couldn't help him because Yusuke told her that he can fight Suzaku alone without her help. Yusuke takes off his shoes and puts them in his fists and prepares for another lighting fist by Suzaku. As Suzaku attacks, Yusuke uses his shoes to avoid being electrocuted, but the force is too strong it destroys the shoes. However Yusuke's plan was just getting started, as he uses the shoes to cover his power-up and unleashes a mighty right hand that hits Suzaku hard.. and at the same time, Keiko prevents Botan to be choked to death as she nails the possessed person with a mighty slap... It seems like things are now going Yusuke's way.
This surprised Nezuko that the same attack happened on the screen and right when Yusuke attempted to punch Suzaku. Suzaku goes down after Yusuke's sneak attack but remains unharmed. Again Yusuke charges, this time with more intensity, but Suzaku still blocks all of his attacks, however, Yusuke manages to sneak in and nails a punch, and Suzaku loses possession of the flute. Yusuke rushes to the flute but Suzaku uses his superior speed and gets the flute back. Now he is definitely furious.
Yusuke had a tough time with one Suzaku, what more with seven REAL Suzakus? All the seven Suzaku flies off and unleashes a lighting arrow attack... and SEVEN powerful lighting attacks are coming Yusuke's way! Yusuke manages to deflect the first six, but he got totally hit by the seventh and knocks him unconscious. Now Suzaku has the upper hand. Meanwhile, Botan and Keiko are once again trapped and they hurry into a room... but it's a dead-end, and they are forced to face the possessed people.. but there are too many of them. Now they are in grave danger.
"You can't save anyone not even this demon that your protecting," Suzaku said holding both of Nezuko's hands while she struggles in his grip.
"Let her go! Leave Keiko, Botan, and Nezuko alone!" Yusuke begged.
Yusuke sees this and thinks that Botan and Keiko are finally caught... He loses courage.. and Suzaku beats him up more with his electrifying attacks. Yusuke was about to give up when suddenly Genkai's voice kicks in Yusuke's mind.. telling him Keiko and Botan are not done yet.. and we see that the two girls are still alive and they practically deceived the possessed people from believing that they were hiding inside the locker.. they deliberately placed the handkerchief inside... now they escape once more.
Now Yusuke realizes they are still alright and regains his composure. He starts building up his energy and releases a mighty blast that almost destroys the whole chamber.. to Suzaku's astonishment... Now the real battle is about to begin.
As Nezuko was watching this fight beginning to be more of a struggle she couldn't stand to watch Suzaku release another lightning fist attack, but Yusuke was up to the task as he himself unleashes his full power and he blasts Suzaku with his devastating spirit shotgun! Suzaku goes down and Yusuke has finally beaten him. However, he has used up his own strength and he goes down too.
Now Yusuke is in real trouble. Suzaku charges up for another lighting fist attack, and Yusuke absorbs the full impact of it. However, he doesn't go down. Somehow he has some strength left, but Suzaku realizes this and sees he doesn't have enough to take another attack. But then Nezuko squirms and kicked Suzaku to the side as he watched the girl retreat over to Yusuke.
'I don't understand why she is so eager to be around this human.' Suzaku thought as he gritted his teeth watching the girl running over to Yusuke.
In pure shock, he stares over to see Nezuko was defending Yusuke.
"She's...protecting him," Suzaku muttered.
He charges up again for another lighting fist, but Yusuke sees Keiko and Botan about to be assaulted by the possessed people... more specifically he sees Keiko.. and suddenly his eyeballs disappear Just as they were back in the human world, and the amount of energy suddenly erupts from Yusuke and he unleashes a mighty SPIRIT SHOTGUN just in time for Kuwabara and the others to see... they arrive as Yusuke nails Suzaku with the immense energy and the force blows up the whole chamber. The possessed people fall... the flute is destroyed!
"Nezuko! Yusuke!" Kuwabara runs over to where Nezuko was as she was on her knees checking if Yusuke was all right.
However, Yusuke is totally drained... Kurama checks him out and notices his heart slowly beating to the point he believes it will stop. In danger of losing a friend Kuwabara decides to share his energy with him for him to live. As Hiei looks on, confused. But when Kuwabara used up his spirit energy he passed out.
"I guess we'll have to carry these two home," Kurama said.
"Make that three," Hiei added.
The two noticed Nezuko was in her bag already. Hiei offered to carry her on his back but he was surprised that Nezuko was so light to carry. While he carried her on his back and went over to pick up Yusuke while Kurama carried Kuwabara he could hear Nezuko's soft snores which meant that she fell asleep while they returned to the human world.
Three days later Yusuke wakes up somewhere and sees Kuwabara and Kurama. He realizes he is in Kuwabara's room and he has been sleeping for these past days, seems like he did beat Suzaku after all. But then he remembers something and asks Kuwabara about Keiko and Botan... Kuwabara and Kurama get this depressed look making Yusuke think something went wrong with them.. when suddenly the two girls burst out of the door and yell at Yusuke for breaking out of the bed.. a bad joke... Kuwabara gets one hell of a laugh.
"Wait, where's Nezuko?" Yusuke asked sitting up from the bed looking around the room.
"Relax. She's in the living room lying on the couch." Kuwabara said.
In the living room, Nezuko was humming while starring up at the ceiling as a shadowy figure stood above her. Her pink eyes met a pair of red ones that were narrowing into hers that it was only Hiei. He brought her to Kuwabara's place last night, and she fell asleep in the bag that she slept a very long time before she woke up again.
She then heard a door open and footprints were entering the living room, "It seems like Yusuke is just fine now. Nezuko you can go see him if you like."
As Nezuko sat up and Hiei backs away she looked up at Kurama standing on her tippy toes and gave him a head pat. The two demons watch the girl enter the room Yusuke was resting in as they exchange looks before they turned to leave. When they exit out of the house after bringing the boys and Nezuko back to the human world.
Kurama turns to see Nezuko standing by the doorway a little far away due to the sunlight penetrating the room. He faintly smiled as he stopped his tracks.
"I think Nezuko is waving goodbye to us, Hiei," Kurama told Hiei as he turned to face the girl who stood at the doorway. Nezuko had her hand up with her eyes shut smiling under the muzzle waving goodbye to the two demons that were leaving Kuwabara's residence.
Kurama waves back at her as he looked back at Hiei, "Aren't you going to wave back too?"
Hiei turned his heel glancing at Nezuko one more time saying, "No. I kept my word that I will fight her again when I'm stronger to face against her." A soft sigh escapes Kurama's lips as he merely nodded to Hiei's composure to still challenge Nezuko after he lost to a girl.
Later as Keiko leaves Yusuke follows and apologizes for the things that just happened.. and it looks like Keiko will be replying with a deadly slap.. but instead of a slap she points her finger at Yusuke.. telling him not to make her worry again, just to promise he'll let her know when he has a case next time. Now Yusuke's mission is finally over.