Posting this again in hopes of finding it Uke is kidnapped and r*ped while his boyfriend is tied up and forced to watch, he (the seme) breaks free during the night and the next day he pretends to still be tied so when the r*pists come back he kills them and escapes with uke, the next scene is basically them in a hospital. Seme is a green flag. It wasn't very long.
Posting this again in hopes of finding it
Uke is kidnapped and r*ped while his boyfriend is tied up and forced to watch, he (the seme) breaks free during the night and the next day he pretends to still be tied so when the r*pists come back he kills them and escapes with uke, the next scene is basically them in a hospital.
Seme is a green flag.
It wasn't very long.