Let me refresh yall. Mieum's dad did this to Jitae because he needed money for Mieum's medical and future study. He's a bit weak remember? jian's mom promised sum money to mieum's dad in exchange he had to kidnap/kill jitae. hajoon told his mom about jitae & mieum so they hired mieum's dad fot this task. those 3 relate to this incident. Well hajoon was there when mieum injured. This psycho smiled when he thought it was jitae who died.
Jian's mom beat mieum's dad. She thought he was dead but someone hide him. I forgot who. Jitae didn't want mieum to remember not because he hates him but he didn't want mieum knew about his dad's crime (he was a good father to mieum so better keep it that way). He can't accept mieum's feeling cuz' he had to send him away to his dad (to keep his safety since jian's mom is looking for them too). Ughh.... Idk how mieum confront jitae. After all, mieum witness hajoon's mom killed jitae's mom. He knew too much and his memory finally come back.
Ps: is that jitae third leg on the last pic?ლ(´ڡ`ლ)