With Kōshi and Momoko poisoned, they have to still battle Tenga Koganei in order to get the antidote, but the sun is close to setting, which means death for Kōshi and Momoko. Upon entering battle, Momoko finds that Tenga is much more powerful than she expected and before long the battle is all but over. When Momoko cannot fight any longer, Tenga gives the antidote to Kōshi, though there is only enough for one person. Right before the sun sets, Kōshi gives Momoko the antidote, and after she awakens to find Kōshi dead, unleashes her ultimate fury on Tenga, and wins the battle. Afterwards, it is found that Kōshi was miraculously healed due to a martial arts technique his mother had performed on him when he was young. Everyone goes back to living their "normal" lives.
With the first battle won, Iroha and Hanzō face up against Tenten in the second match. After a little while, Tenten starts to tease Iroha by revealing to Kōshi and Momoko that Iroha is in love with Kōshi. This in effect makes her enraged to the point where she cannot battle properly and is defeated. Hanzō tries to turn things around which gives Iroha the last bit of strength she needed to give one last powerful attack, though Tenten easily countered it leaving Momoko to intercept Tenten's last attack before it hit Iroha. It turns out Tenten is in love with Hanzō, though does not reveal this. Instead, she gives up her portion of the antidote and walks off. This leaves Kōshi and Momoko to go on ahead to the final battle.
Kōshi was made to swallow a ball of poison from the Tenga clan and was told that in a week he will die unless he is given an antidote. Momoko willingly swallows the same poison so that if Kōshi dies, she does as well. Momoko and the other martial artists on their side train for a week, and Kōshi tries to learn a technique of his own, but fails. Kōshi and the others then go to the Tenga clan's main house and must fight several battles to gain the antidote.
A woman claiming to have been fired from being employed as a maid arrives at the apartment building. where Kōshi is currently staying. She initially comes off as a kind and helpful person but soon reveals to Momoko that she is an assassin who has come to kill Kōshi. Momoko tries to plead her case to the others, but no one will believe her.