welp, it's a pretty negative and stereotyped depiction of trans people (trans women are just gay men who went too far, trans women are perverts, etc.) but at least the squick is well done? I dunno, if I had to find one good thing about this it's that the patterns of abuse perpetrated by Rin are at least realistic, if you take away the bit where Touma is a consummate masochist.
For me, the best trans horror manga will still be "Me, Kawase, and 'That Thing' One Summer".