what’s this manhwa

she has purple hair and works for a company of this game like vr type simulation and she’s usually a npc, but i think she dies one day playing and is stuck and she helps the male lead who’s stuck in a tower feeding him an antidote to not sleep bc if he sleeps disaster will fall onto the world. then one day she feels bad for him and tell him to sleep and gives him medicine and disaster strikes and she ends up saving the world and disappears while he wakes up and takes credit for it like she planned. then he tries to find her. i just forgot the name and wondering what it is, saur if anyone knows it would be greatly appreciated tyyyy :3