Kuwabara isn’t worried though, and shows off his new abilities by summoning his Reiken and bragging that after killing the Beasts he wants a rematch with Urameshi. Hiei snorts with disdain, infuriating Kuwabara, who challenges him to a fight. "Hn, omoshiroi," Hiei replies. Yusuke parts them before the quarreling gets worse.

Koenma is watching this through the videoscreen in his office, and he's impressed by Kuwabara's skills. He speaks of appointing the human boy as a Tantei, but George reminds him of the proper bureaucratic procedures of nominating a new Tantei, annoying the toddler.

Kazuma makes the Reiken grow as long as a spear, saying that the weapon is flexible and obeys his commands... but he trips on his own feet and falls flat on the ground.

Botan calls Yusuke on the comm to tell him that she found several insects near the playground; she's worried that children might be the next victims. In the middle of the call she's attacked by a man under the Beasts' control; she runs away and tries to hide. At last she knocks him down with her baseball bat, but the message is clear: the situation in Ningenkai is getting worse fast.

A horrible sound shakes the walls and the ceiling; Kurama recognizes it as Byakko's roar. The boys run up the stairs of the tower towards a platform where they find the second Beast waiting for them. Yusuke and Kuwabara are frightened by the creature's size. Hiei volunteers to fight him, but Kuwabara stops him: "I said the next one would be mine!"

Byakko's intentions are clear: to devour the four Tantei, including Hiei and Kurama — the Beast and the two youkais had clearly met before. With his roar, he destroys most of the platform, leaving only a narrow passageway between them and the boys. Beneath them, only clouds can be seen.

Despite Yusuke's protests, Hiei's incredulity and his own shaky legs, Kuwabara crosses the passageway and calls Byakko to the battle. The Beast laughs out loud, amused at the challenge from someone so small and weak. He pulls four strands off his hair and blows them; they turn into four dog-sized green demonic animals.

Kuwabara defends himself as he can, Reiken against sharp claws. But it's a four to one combat. Yusuke tries to convince Kuwabara to let him replace him, sure that he can knock the four animals out with his Shotgun. "I'll feed you to Byakko if you interfere, Urameshi!" Kuwabara shouts back.

But the ningen is obviously in disadvantage. Yusuke steps on the passageway: "You can't beat them all with your sword!" That gives Kuwabara an idea. He starts crossing back the passageway, the four animals run after him. Byakko and Hiei take it as cowardice; Yusuke prepares to take Kuwabara's place. But in the middle of the cross, Kuwabara halts and turns, making his Reiken grow. The narrow passageway forced the animals to cross in a single line, and the Reiken impales them all together.

The animals don't die though, and keep hunting Kuwabara, who crosses the entire passageway, runs pass his teammates and around the tower they came from. Tying the two ends of the Reiken around the tower, he forms a demonic "doughnut". Even Hiei is impressed with this weird solution.

Now it's time to face Byakko himself. Kuwabara slashes through his chest twice with the Reiken, but the Beast absorbs the sword's power and grows even bigger. The Reiken, on the other hand, gets smaller, forcing Kuwabara to spend more energy to make it grow again. The effort is tiring him fast.

Yusuke tries again to convince his friend to retreat and let him fight instead. "Do you really think I'm the kind of man who would retreat now?" Kuwabara yells back and runs to another attack.