I think when he used to be beaten by his elder brother that's when he first time see her happy in her world with her ex (that mf) and he wants to experience that to how to feel loved maybe that's why he is obsessed with her.......
Straight manga beautiful art FL is magazine reporter her boyfriend breakup with her with rich man's neice and fl decide to seduce uncle I can't remember the name
I think there will be a hiatus soon.......