Series: Touhou - The Princess is a Witch!! (Satou Kibi)

Artist: Satou Kibi
Original title: お姫さまは魔女!! (Ohime-sama wa Majo!!)
Gallery: https://e-hentai.org/g/792305/eb30bc3309/
Pairing: Remilia x Patchouli (RemiPachu)

After Remilia discovers Patchouli eating gyouzas with garlic (which smells very unpleasant to vampires), Patchouli tests Remilia's love for her
through a thought experiment.