A story about a futanari witch who summons her past self with summoning magic and has sex with her smaller self
Bocchi de Shinda Ore ga Bishoujo Nurse ni Natta Hanashi | The Story of How I Died Alone and Became a Sexy Nurse
Doppelgänger ni Kanojo mo Jinsei mo Ubawarete Bakunyuu JK ni Sareta Boku | My Doppelgänger Stole My Life and My Girlfriend, and Turns Me into a Buxom JK
Witch Avatar's revenge (2D Comic Magazine TS Jibun Heroine mou Hitori no Ore ga Erosugite Gaman Dekinee! Vol. 1)
Gag Jikuu no Onee-chan to Ero Doujin no Onee-chan to 11-ten no Onee-chan to Sex Suru Hon (Touhou Project)