Enmusubi no Youko-chan EP17 - Vow on the Grievance Tree

Haku Gessho and the others watch the performance in the Tosan Theater, watching the final scenes that unfold between Tosan Koko and an elderly Touhou Gessho. The effects of the little theater production become increasingly real much to the surprise of the observers, including Tosan Roro. As the performance reaches the climax a mysterious man appears who controls illusions and puts all but Roro to sleep. This man is revealed to be younger brother to the Tosan sisters. Just what is he after?