KSBJ-196 Mako Oda, an H-cup stepmother who confuses her son who is repeating a grade.

My husband's stepchild, Ichiro, repeated a year at university. - We got along well when we first got married, but after repeating a grade, we don't even talk to each other anymore. - However, the cause was me. - In fact, it seems that Ichiro can't get my H-cup breasts out of his mind, and that's why he can't study. - I felt sorry for Ichiro and decided to make his wish come true...