18+ Kanaete! Jinniyah-chan!!

Kenichi Nishikasai is a 31-year-old man but with a body of an elementary school student. While trying his new onahole, a beautiful lady genie appears, who is actually a demon trapped by gods she angered. He has three wishes to make before his soul is taken away. Read as he wastes his wishes for his soul.

(Source: MangaDex, edited)