SPRD-1455 The sex friend at that time was... my friend's mother, Marika Kobayashi.

Honestly, I only realized how intense the sexual desires of women in this age group are... and that aunt had a masochistic streak, obeying everything I said... Our relationship continued even after I went to college... When her husband wasn't home, we'd basically have sex non-stop at my friend's place. Lately, we'd casually go out to my house or love hotels to have sex non-stop... It was like a typical boyfriend-girlfriend relationship... Honestly, it was getting tiring... And then... an incident occurred...