Clumsy Haruhiko and violent Mai need more people on their Phantom-fighting team. They meet a Phantom Eater, Reina.

The team sets out to deal with security robots turned Phantom. But it turns out that Minase Koito was already there, fighting the haywire robots with her beautiful voice.

A pair of Phantoms terrify people as they try to cross a bridge. The team goes to investigate, and Mai begins to remember something odd about the place.

After a huge victory feast with the team, Reina vanishes on a mysterious bus, hypnotized.

Kumamakura Kurumi sucks Haruhiko and the gang into a fantasy world inside her own mind, filled with talking bears and giant mushrooms.