Ojou-sama no Doki-doki Daisakusen: Norowareta Kurenai no Yakata

Ojou-sama no DokiDoki Daisakusen is a fan-made Touhou Project platform action game, developed by BlueMica. It features Remilia Scarlet as the protagonist and Flandre Scarlet as the second protagonist. Saigyouji Yuyuko is also a playable character.

One day in the Scarlet Devil Mansion, Remilia and her staff have a tea party with Marisa Kirisame, Yuyuko Saigyouji, and Youmu Konpaku as "guests" (read: they invited themselves). Intent on proving her peaceful intentions, Marisa shares some of her new "Shroom" brand tea with everybody.