I forgot the name of this manga. It's not yaoi though but it's not like shoujo either i forgot its genre tag so yeah... It's about a girl i think her name's Yoshino and her grandfather set her up on an arrange marriage to a guy who turned out to be kind at first then as the story progress he showed his true colors to the girl, revealing a sadistic maniac like personality.
Thank you sir. ur son is now for sure gonna get dicked tonight lmao