He actually knew (and even had a very special relationship) with juno. The thing is that at first he thought that he went back in time so he could stan jay earlier but he realised, when he went back to the future and again to the past, that that wasn't the reason at all. He was given another chance of reuniting with juno and perhaps? (Idk about this) try to change somehow what happens... Which at the end he somehow does. In the future (the present at the beginning of the manwha), they don't remember each other and they live separately. Yeah, he kind of re-meets him, he didn't remember him in the future we see at the beginning. Lol, idk if this explanation made any sense (▰˘◡˘▰)
I'm so confused so he travelled back in time but he's still roommates w juno but didn't that happen in the futire? Like did he time travel when he was drunk and like re-meet juno? Can someone explain please I'm kinda dumb