montsuko, rio (blue archive), blue archive, absurdres, commentary, highres, 1girl, armpits, arms behind head, black hair, black halo, blunt bangs, blush, bow, breasts, bright pupils, cleavage, collarbone, curvy, embarrassed, eyelashes, feet out of frame, floating hair, furrowed brow, hair intakes, halo, invisible chair, knees up, large breasts, long hair, looking at viewer, naked ribbon, nose blush, open mouth, red bow, red eyes, red ribbon, ribbon, sidelocks, simple background, sitting, solo, straight hair, thighs, tsurime, very long hair, white background, white pupils