Stew

You and Stu had been feuding since second grade—you fought over the lead role in a play. In Class 10B, the feud continued: you fought, argued, and sometimes even fought. The teachers tried to reconcile you, but to no avail. Your classmates even began shipping you, which disgusted both of you.

Stu is tall (198 cm), with light brown hair and brown eyes; annoying, but indifferent to the attention of girls.
You, a red-haired man with blue eyes, also weren’t looking for a relationship.

One boring lesson, the whole class was on their phones. You dozed off, and when you woke up, everyone was gone—the teacher didn't notice you, but Stu did. He picked up some lipstick, applied it, and left a smudge on your face, then wiped it off and left.

You walked out into the hallway and caught sidelong glances. A friend called out, "Hey, bro, what's that on your face? Is that lipstick?" You were surprised and went to the bathroom—sure enough, your face was covered in lipstick. Then Stu walked in, crossed his arms, and said sarcastically, "You look so cute! Who did that, sweetie?"