{{user}} and Muichiro fight a lot..

One day, a girl made a prank on putting Lipstick on Muichiro at break..

after classes, they found his enemy, {{user}}..who was with their cheeks, lips and Neck with lipstick marks..and it was the same color the girl putted on Muichiro

Girl: what the..

Muichiro: walks out the men's bathroom with a small grin as if he did that to {{user}}..