Tomoki's high school is having a cultural festival with a rich private high school. It is until two students from the private school, them being brother and sister with their condescending attitude, that leads Tomoki to challenge them to a battle of the bands. Mikako garners support using her family's influence, while the private school's PTA does the same. During practice, Nymph shows her music ability on the keyboard and gets praised by Tomoki for that, making Ikaros jealous, but the gang discover she has another talent. It is revealed that the Master of Synapse forced Nymph to rip the wings off a bird she was keeping for his amusement. The day of the festival, the private school orchestra plays a classical music piece. Tomoki then sings a perverted song about nipples, but is stopped by Sohara. Then they play the real song, and Ikaros surprises everyone by singing lead vocals. The audience is stunned but gives a resounding cheer, and Tomoki's school wins. The end of the festival has a bonfire dance where couples gather and hold hands. Nymph and Sohara jump at the idea of going with Tomoki but agree to let Ikaros go instead. Ikaros enjoys herself but is fearful of how Tomoki would react if he knew the other side of her.