I believe they were hinting some accidents when the mc was young right? And it seems that he's not remember all of the info abt that. What if professor cha, (or his dad/fam) is involved with it. And they purposely gave him those meds to mess with his mind and memory?
YOU DESERVE WHAT YOU TOLERATE. YOU READ WHAT YOU SOW. DESERVE NYO ISAT ISA WAHAHAHAHAHAHHAAH NAKAKAURAT BOTH IF ONLY I COULD GO INSIDE THIS MANHWA