2girls, 3koma, a phrase, alternate costume, apple, apple on head, blunt bangs, blush, chibi, comic, emphasis lines, english text, food, fruit, greyscale with colored background, index finger raised, looking at viewer, math, medium hair, monochrome, multiple girls, object on head, open mouth, pun, red background, school uniform, serafuku, shark girl, sharp teeth, sidelocks, speech bubble, teeth, two side up, typo, virtual youtuber