fukutchi, kouhai-chan (fukutchi), original, absurdres, commentary request, highres, translation request, 1boy, 1girl, black serafuku, black skirt, bob cut, bottomless, chair, closed eyes, fellatio, from behind, greyscale, heart, height difference, hetero, kneehighs, medium hair, monochrome, on chair, oral, petite, pleated skirt, sailor collar, school uniform, serafuku, sitting, skirt, socks, speech bubble, swivel chair, thought bubble, trembling, under table, wariza