1LDK+JK Ikinari Doukyo? Micchaku!? Hatsu Ecchi!!? 7

Every day the life of these two together becomes more and more similar to the life of an ordinary couple who lives together. Ken, having finished work, refuses offers to go out for drinks with his colleagues, lies to them because they have already begun to suspect that he has a girlfriend, and returns home noticeably earlier than usual. Akana is already at home: in her school uniform, but with an apron tied over it, and she is preparing dinner. After eating, while Akana is devouring dessert, Ken says to her: “If you eat sweets like that, you’ll definitely get fat.” Akana, who was already a little worried about this deep down, begins to think about dieting. And then Ken, as if nothing had happened, says: “And if we have sex, this is also physical activity, and we will both enjoy it. Two birds with one stone, no?”
In short, he ended up suggesting she fuck as a way to lose weight.