Love Is Nothing

Be, Cruelly Torturing an Unknown Childhood Sweetheart Chasing His Wife in the Crematorium

I want to read a book like "After she was released from prison, she was tortured by a bamboo horse until she became stupid and mute". The second male protagonist has twisted hobbies, and the male protagonist takes revenge on the female protagonist. (He personally sends the female protagonist to prison, and has her child aborted.) In the end, the truth is revealed, and he regrets that belated love is worse than grass.