Yeah... he was struggling with two selves - the him who is growing up and wants to get away from his parents especially the mom, and the him who wants to be with his mom.
But now with the trauma from his cousin's issue, there is PTSD too. This can't be good for his mental health...
Oh cool, now not only my boy is mentally fucked, the mom also is MENTALLY FUCKED
Every single male protagonist that Oshimi writes is born to suffer lol