After being belittled by the arrogant Cerulean Blue, Chihaya struggles to increase Carmine's power, leading Natsuki to suggest a magical power-up through physical intimacy. When a Seed infects the Angel Kiss cafe and plunges the patrons into a state of mindless ecstasy, Chihaya is nearly overwhelmed. However, the strength of her love for Natsuki allows her to break free and defeat the enemy, ultimately leading her to embrace her feelings for him to become a stronger warrior.