You don't really need much translation for this. An anon posted a translation for 76 in >>144820146
麻理 = Mari
She was stalking him.
Eventually she had a breakdown when she found out her name was Fumiko.
Then she broke into his house and went crazy.
Then possibly when she stalked him he actually caught a glimpse of her one time and she lost it completely and became him.
quick translate, cba to typeset all that stuff on 18
Sorry about lazy on this one, it's just like the last chapter from what I can see at a glance: about not going to school and not talking to anyone, same mundane shit
So holy shit. I never thought it would go this route. That throwback on pg 19 to Mari's face when she turned around while he was following her the night they "switched." Great touch.
What the fuck happened in this mangaka's life?