
Oh girl I KNEW IT!! IT HAD TO DO SOMETHING WITH THE COLOR OF THE HEART!!

I mean you can see that the male leads has different colored hearts. I was just thinking that, what if the colored heart represent her relationship with the ml? if the heart was darker then it would lead into a bad ending type, but if the heart was pink then it would mean a happy ending!! But I am not sure about the yellow heart that appeared on her black haired brother.

yeah you are right percentage actually doesnt matter after that colour system came.
Derrick ( orange ) : Fascination and desire ( yeah he love penelope in that way not as sister thats why when she calls him brother he doesnt like it )
Renald ( pink) : Familial love
Vincent( purple): imperfect love ( bcz of trust issues they both dont trust each other well vincent will regret this but he will not become obstacle and will help penelope a lot. )
Eclise ( black ) : obsession like real yandere type of obsession. There is a lot of to argue about him i liked him at first but know i hate him. I somehow understand him too but he just went too far.
Callisto ( red ): True Love ( even his percentage isnt high like eclise, he was ready to kill himself if penelope died. He loves her so much that is why HE IS OUR KING.
Girl when I saw his old haircut… it killed me that he kept it that short, now it gives me the ick… And I thought his old hair will cover his eyes