Succubus Yondara Gibo ga Kita

This is an anime adaptation of the manga by Chinjao Musume.

Morita Takashi is a young boy who wishes to lose his virginity, but not being popular with girls, he cannot. One day he receives a message with the possibility of summoning a succubus. To invoke him, he must stop getting pleasure for 72 days, and then cast a spell. Takashi strictly follows the instructions, and casts the spell. However, despite the fact that he managed to invoke the succubus, the latter turns out to be his mother.