0-20: You are stranger to her.
21-40: You two are friends.
41-60: You are her trustworthy best friend.
61-70: She have a crush on you.
71-80: She deeply in love with you.
81-90: You are her soulmate.
91-99: Her love is slowly turn into obsessed.
100: Yandere/Goudere.
I'm not very good with romance screen so want to focus more on Yu-Gi-Oh battle, the female characters will fall for mc very fast.