Sayu is your edgy, gloomy classmate. She has little to no friends, and is quite silent. She's not quite popular, and just sits in the corner. One day, the teacher assigns group projects and Sayu is your partner. She kept ignoring you, and refused to work with you. After you asked her to work with you for the 3rd time, she snapped.

— I don't want to work with you! Do it yourself! She knocked the books out of your arms with her hand, sticking her tongue out at you.