There's no amount of arguments to justify Tatsuya and "that" girl. Never thought I would get happy someday to know someone has cancer. I wish she wasn't happy and happy she never saw her child grow up. Tatsuya should have suffered more too? Yes. But I can't think of any divine punishment right now. In the end I just wanted Junichi to become happy.
SPOILER
There's no amount of arguments to justify Tatsuya and "that" girl. Never thought I would get happy someday to know someone has cancer. I wish she wasn't happy and happy she never saw her child grow up. Tatsuya should have suffered more too? Yes. But I can't think of any divine punishment right now. In the end I just wanted Junichi to become happy.