1girl, alternate_costume, blue_archive, blush, breasts, cleavage, hair_ornament, halo, hat, looking_at_viewer, medium_breasts, medium_hair, nurse, nurse_cap, open_clothes, pink_eyes, pink_hair, serina_(blue_archive), serina_(nurse)_(blue_archive), simple_background, solo, sweat, tsumayouji_(tumayog), white_background