1girl, alternate_costume, arm_behind_back, ass_visible_through_thighs, blue_archive, bra, breasts, cleavage, collarbone, curtains, feather_hair, halo, happycloud, hat, holding, holding_own_arm, holding_syringe, indoors, looking_at_viewer, medium_hair, navel, nurse_cap, one_side_up, panties, pink_bra, pink_eyes, pink_hair, pink_panties, polka_dot, polka_dot_bra, polka_dot_panties, serina_(blue_archive), sidelocks, simple_background, smile, solo, stomach, syringe, underwear, underwear_only