help

kinda forgot the plot but does anyone know the name to this manga where theres this boy and girl couple and the girl has stalkers and exes and the guy accidently stabs someone and lots of people called him a murderer and that he deserves to rot in jail etc and i think he lost all his friends and he becomes depressed and he has no other choice but to kill the other guys since he lost everything and all he has left is the girl

i do rememebr this one part when one of the stalkers broke into her house and he was holding a knife to her throat then the boyfriend smacked the stalker in the head with a pan/microwave or a bat i fogor then he stabbed him and the stalker died

i think the guy has like brownish hair and the girl has blonde hair with a fringe?? idk tho could be wrong