VEC-470 A secret between me and my friend's mother. The thing about being forced to have sex with Auntie and cum inside her… Mitsuha Hamaguchi.

Kobayashi falls in love with his kind mother, Mitsuha, when he visits a friend's house. The other party is a married person and the mother of her friend. He can't give up even if he knows it's a love that shouldn't come true. Kobayashi, who can't help but worry about Mitsuha, sneaks out of her room and goes to check on Mitsuha, but there he learns a shocking truth about her. Her secret feelings for Mitsuha, which she had intended to keep only for her admiration, begin to run out of control...