What's the logic behind I-have-learned-you-had-amnesia-so-i'll-avoid-you????

im so confused at this part like i thought after the accident he didnt remember yesung but all these flashbacks are happening after the accident so i was like ?????? so did he remember yesung for a bit or

actually nevermind i got it SGHSGSHSH

I think its not a flashback but sihoo's anxiety

i think that after the accident he still remembers but he’s slowly forgetting that’s why he was anxious that he’s going to forget his bf and theres a scene where his bf called him but he doesnt remember who’s calling :”)