Responses
Yep as you guessed, that accident happened before they met, so sihoo was already suffering from amnesia and that's the reason why he dropped the College and frequently went to hospital as rumor were also there about it in his College.
It was kinda confusing though cuz I wasn't sure when the fire incident happened and whether they started dating after or before that which made me think a lil and I concluded that they met after the incident happened and by that time Sihoo was already having problems with his memory which was slowly degrading but it became worse after they dated cuz he suddenly forgot about Yesung.
But overall I like it cuz I really needed some fluff rn uwu (=・ω・=)