I think that's the thing with manhwa or manga artists? It's either they went from a simple story or heartwarming, fluff story to an absolute complex story (sometimes they even take a crazy route to a complete toxic, morally grey area type of story) or the opposite, they went from a tragic/toxic/complex story to all sunshine, jolly and rainbow story
I remember one mangaka, i read almost all of their manga and almost all of it lean towards more on a fluff highschool story sweetheart and then i read oje of their oneshot and it's like.... A complete 180°

This story is so good it's hard to believe it's the same author as Flip Turn (no hate, it's just a much more simple story in comparison)