Anime helps me escape reality's feed

Hi guys!! I remembered this one manhwa I read a chapter of that I can’t remember the name of… I think it was straight romance where this guy and a girl (i forgot his relations w the guy or how they knew each other) got put into this blank white room and had a system tell them how to remove their handcuffs/get out the room… Ik this is SO vague but i only read like the first half of the chapter and dropped it but now i’m curious again, pls help ╥﹏╥