What is confusing you?
The amnesia thing. Like is it a recurring thing?
And the timeline in these recent chapters
Seems like his amnesia happens often and he only forgets the good things, that makes his life pretty sad. But the fact that he always remembers Taehyuk should mean that that guy often brings him bad memories, but they are still kida close. Maybe because our MC doesn't want to be alone, so he let's him stay by his side. As for the timeline: ch.17 starts in the normal timeline. It theoretically ends with a flashback that shows our MC and ML at university. The problem is that the last page of ch.17 is mixed up, that page should be before the MC faints (it was a mistake that might've happened during uploading). As for ch.18 it shows more of the flashback and proves that the ML was always good to the MC but something must've happened afterwards so that the MC forgot about the ML and I'd bet that Taehyuk was behind it, because he might know how to trigger the MC so that he'd lose his memory again. (the last part is just an idea of me)
I hope that helps you.
thank you!
I am so confused right now..