Lover666's manga / #Second Chance(1)

I know it's a rivalry between them and the guy is actually psycho. And that MC had/has a wife. Also, it's not a BL but I got shipping vibes with their rivalry friendship with the psycho blond guy and MC dude. Edit (2/3/2023): The psycho blonde guy played the long game of torture with the MC. He is always sis, everytime he is all nice; you know deep down that he is plotting something. I was fooled that somehow they could've been wither best friends or even regular friends. But, blonde haired guy is extreme.