1boy, 1girl, ?, ass, black_sailor_collar, black_skirt, cardigan, desk, from_behind, kubo-san_wa_mob_wo_yurusanai, kubo_nagisa, long_hair, looking_at_viewer, looking_back, orobou, pleated_skirt, pov, profile, purple_eyes, purple_hair, sailor_collar, school_desk, school_uniform, serafuku, sitting, sitting_on_lap, sitting_on_person, skirt, smile, yellow_cardigan