Pretty vague....but all I remember is that the MC was slowly forgetting the ML....like he ...

Pretty vague....but all I remember is that the MC was slowly forgetting the ML....like he would forget the ML's face(I think it was only ML's face he would forget and remember others or maybe not.....ain't sure) and was trying to hide it....the ML realized and confronted MC about it or told it to someone else....not sure