
she got strangled to death (imagining that its makoto strangling her) and her corpse appears on the front page of the newspaper that one of the inmates in the prison where makoto is reads
makoto doesn't know? apparently? talks to other inmates about still having a girlfriend and missing her and wondering how shes doing and after getting out imagines mikoto's disgusted face upon getting told that he loves her

The whole thing about Makoto's backstory is (From my own interpretation from translations and raws) Is that the man Makoto lives with now isn't his blood relative at all, and was just a random man he used to play with in the playground when he was younger.
A fire had happened in Makoto's house, which seemed to have probably killed his parents inside, and seeing the opportunity, the man took Makoto to live with him, it seems that ever since, the man groomed Makoto and did the things Makoto does to Mikoto now.
Hope this properly explains things.
and i did not expect much but
why the fuck makoto gets a fresh new start while mikoto gets killed by one of her one night stands cos she continues getting off from nearly dying. what the hell