WHY IS THIS UNDERATED!?

HAPPY END
FL got reincarnated to become a mean sister from her past life novel she read. But she loves her sister so it's all good. And then ML (OGML too) came to marry her sister, but bc in the future her sister will die, she will marry him instead.

SO FUCKING GOOD?! THE ROMANCE? THE PLOT? THE CHARACTER? AND THE ART??? OH GOD... WHY DOES IT HAVE TO BE UNDERATED???

HAPPY END
The FL got reincarnated to become a sick (very sick) side character. And she tries her best not to die.

I swear this story is so calm. There's no second male lead!!!!!! But still, it makes me cry so much. It's so touching. The father-daughter relationship is so wholesome. and the ML too... when he tries to know more about feelings.. it's so well written.