Yohrou's feed

Hi guys, I’m looking for a manhwa that has a black haired FL and I think also a black haired ML. The story is basically about the FL being sacrificed and the devil kinda liking her and she like survives the sacrifice. Side character is like “wow, bet I can do it too if she did it” then the side character ends up getting k/lled by another Devil/God (can’t remember) then that same Devil follows the FL instead. I remember that the cover was kinda deceiving since the story was dark but the cover was FL and ML smiling and all bright and stuff （￣へ￣）

Please help, thank you (⌒▽⌒)