[Kusayarou] FGO Shuten Doji x Nero Possession Manga (Fate/Grand Order)

Shuten Doji slips her spirit into Nero Claudius's body through a special potion, and the possessed emperor sprouts horns mid-straddle, riding her Master bare and shameless while the real oni savors every drop from her own skin. What begins as one body-snatched Servant milking her Master dry becomes a two-on-one ambush, both demon girls flushed, dripping, and competing to be filled. As Nero's mind bends under the spiritual contamination, Shuten purrs her true ambition: turning every girl in Chaldea into her clone demons, a world where only she and her husband remain.