1boy, 1girl, arms_behind_back, bdsm, black_hair, blush, bondage, bound, brown_hair, crotch_rope, cum, cum_string, gag, gagged, hetero, looking_at_viewer, open_mouth, out_of_frame, pov, pov_hands, ring_gag, rope, school_uniform, serafuku, shibari, sitting, solo_focus, tears, tied_to_chair, toothbrush