1boy, 3girls, 4koma, aged down, ahoge, anger vein, artist name, black necktie, blue eyes, breasts, chinese text, closed mouth, comic, crossed arms, female child, hair between eyes, jacket, large breasts, long hair, long sleeves, math, multiple girls, necktie, no nose, open mouth, pointing, round eyewear, shirt, short hair, small breasts, smile, teacher, teaching, white hair, white shirt