Investigating the mass teleportation leads Rudeus to seek out his most elusive classmate: the brilliant Silent Sevenstar. But when he calls at Silent's laboratory tower, he finds a familiar face that he didn't expect—and doesn't welcome.

Sylphiette reveals herself and Rudeus admits his feelings, but even that isn't enough to cure what ails him. After their heart-to-heart, Sylphiette sets out to end his problem once and for all.