1girl, aizawa_tomo, bare_shoulders, bikini, bikini_top_only, blush, breasts, closed_mouth, collarbone, curtains, hachi_(888hachi), large_breasts, looking_at_viewer, navel, raised_eyebrows, red_eyes, red_hair, short_hair, solo, stomach, striped, striped_bikini, sweatdrop, swimsuit, tomboy, tomo-chan_wa_onna_no_ko, upper_body, wavy_hair, window