It's a bl where the mc got cheated on with a relative or someone close to him (I forgot but he has a connection with the guy he got cheated on with) and the guy killed the mc's grandfather, then the mc seeked revenge. I don't know if he went back in time or not, but he still seeked revenge.
It's a bl where the mc got cheated on with a relative or someone close to him (I forgot but he has a connection with the guy he got cheated on with) and the guy killed the mc's grandfather, then the mc seeked revenge. I don't know if he went back in time or not, but he still seeked revenge.