1girl, o, black_bra, black_panties, blue_archive, blush, bra, breasts, closed_mouth, halo, long_hair, looking_at_viewer, multiple_views, navel, open_clothes, open_shirt, panties, purple_eyes, purple_hair, shiitake_taishi, speech_bubble, standing, stomach, two_side_up, underwear, yuuka_(blue_archive)