"Toshi...!" Kondo called out to Mugensai, who was suffering in front of him, by his nostalgic name. However, Mori Ranmaru appears and captures him for rebellion against his master. On the other hand, in order to rescue the emperor, Takasugi and his friends invade the giant castle Susanoo again. Deeper inside the dungeon... What awaited there was――. Izo, who saved his life, and Ryoma set out to take back the chronometer. And finally, Katsura reveals the feelings she's been holding in her heart.