天穹-2.5D F-不可知 - 2

1girl, solo, long hair, breasts, looking at viewer, bangs, skirt, shirt, holding, jewelry, white shirt, purple hair, pantyhose, earrings, necktie, glasses, collared shirt, indoors, black skirt, english text, black pantyhose, black necktie, pencil skirt, classroom, chalkboard, teacher, chalk