Ayakashi Triangle manga volume 4 features story and art by Kentaro Yabuki.

Matsuri and Suzu investigate an abandoned house where ayakashi have taken residence. Shirogane is barred from entering, so Suzu tries to resolve the issue with her own powers. But she and Matsuri soon get swept away in the happy illusory scenes projected by one of the house’s ayakashi, and Matsuri encounters someone strangely familiar. Are they friend or foe?