Responses
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Or I should say had a girlfriend because she is dead from the start you learn about all of that stuff throughout the manga
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Yes! Ifound it if anyone is interested in reading it
http://www.mangago.zone/read-manga/junai_virus/an/junai-virus-chapter-3.html/2/
Looking for a manga
It's a yaoi where the seme has a girlfriend but he is in love with his friend(uke). He is only dating the girl because she is blackmailing him with his feelings for the uke. The girlfriend gets the friend to fall for her and tries to get him to commit suicide with her but only she dies (she hates that the seme doesn't love her so he shouldn't have the one he loves). The uke tries to atone for his sin of loving the seme's girlfriend by sleeping with the seme. It might be a one shot, I can't remember. Hope this is enough info.... still searching
Thanks