I remember everyone hated Isami for doing what he did for his erection. It turns out it what he did actually solved it and he got his erection back lmao.
Tobio didnt use a condom. who knows whose the child. this actually may break Tobio's friendship with Isami. just to add onto the wound that is him going to have to break the news of Ichihashi's death to Renko.
The Dad seems pretty chill for someone who doesnt even know his daughter has a boyfriend and has walked into what seems to be after their love making.