http://www.mangago.zone/read-manga/like_as_the_time_will_come_when_it_will_rain/
Reflection in the mirror story.
You prob already read it but: http://www.mangago.zone/read-manga/vanishing_twin/ Also, this one is great too: http://www.mangago.zone/read-manga/tied_up_in_twins/?av=2
I know a yaoi callled twsited in twins? also maybe http://www.mangago.zone/read-manga/soukyoku_megu_iroha/
http://www.mangago.zone/read-manga/tied_up_in_twins/?av=2
http://www.mangago.zone/read-manga/breath/
Looking for some crazy twin psychological manga. Like where a twin is always compared to the other and when the other one dies the one alive pretends to be the other. Or something along those lines