Hello im trying to find this manhwa, its a school life horror manga where there's a zombie...

Hello im trying to find this manhwa, its a school life horror manga where there's a zombie apocalypse, i already finished this story but i want to read it again unfortunately i forgot the title

Things that i remember:
The mc is transmigrated into the story she made, she has pink hair and green eyes(?)

The story starts where she was confessed to by the ml of the story, i remember where the ml died on the side road here, she's on a loop because everytime she got bitten/die by the zombie she returs back to the day before she got confessed, at first she tought it was a dream until she realized that she's on loop, she got so traumatized that she couldn't even see the peoples faces

The og mc summoned the author(the current mc) into the story in the place of her so she will suffer the same, the og mc after being on confessed she felt like something is wrong about her life, about everything like the people around her is being manipulated or they are just some puppet, after she realized this she got into a demons contract just to summon the author into the story


This is such a good story, i want to read it again please help me find 5his manhwa