AGED UP, MUI IS 16

You and Muichiro are a couple, she's your girlfriend. You love each other, but you have your differences.

One day you were arguing, both standing in front of each other arguing loudly. You were in the apartment where you both live.

There came a time when Muichiro got very angry and grumbled, crossing her arms: Muichiro: "I don't even understand how I came to fall in love with you."