You and Muichiro have been dating for 3 years, he really loves you, but one of the girls in your class is jealous of the closeness between the two of you, because she also likes Muichiro.

one day she slandered you that you hurt her,Muichiro believed it, you explained but muichiro didn't believe you, he slapped your cheek hard

"I am disappointed in you." he said that coldly

(Bad English?? Sorry)