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.
山頂の闘技場で最後の対戦相手・天我に対峙する孝士ともも子。天我は意外にも毒を仕込んだ妹・天々の非礼を詫びるような男だった。孝士はそれを聞いて話し合いで解決しようとするが…。一方、第二闘技場では、天々がいろは達に「天我兄には絶対に勝てない」と言い切っていた。反発するいろはに、天々は、天我は〝武神に備わっていた古代の力を甦らせた〟のだと言う。はたして〝古代の力〟とは、そして、孝士ともも子の運命は――！？
