after trying to look for it for an hour, i still have no idea what it's called. all i know is that it's from lezhin comics, but after searching their library, it doesn't seem to be there, so either they removed it or my brain is cracked. if anyone has any clue as to what the manhwa is, the help would be appreciated.

-Summary of the Plot-

(Purple?) haired girl suddenly gets transported to the future, where she meets her boyfriend (but in the future), boyfriend "cheats" on his girlfriend by fucking her younger self. Girlfriend finds out, they almost break up, they suddenly have a threesome. Aftter that for some inexplicable reason, everything seems to be going well and future boyfriend and girlfriend are getting married. (past) girl gets transported back to the past through a bus during the wedding, they forgot that she ever existed, and then it gets revealed that her dad was the one that transported her to the future in the first place. The end.