Responses
Jaehyun said something "hit" on chapter 36-37. So i guess, it got ruined because whenever jaehyun "misbehaves" (according to kang minwoo), he got punishments; and knowing kang minwoo is somewhat violently possessive towards jaehyun, i think that'll support the reason why his wrist got messed up is because on how minwoo violently hit him for how many times.
tbh what did kang minwoo did to make jaehyun’s wrist messed up??