1girl, 4boys, black_gloves, blush, breasts, cleavage, clenched_teeth, collarbone, commission, covered_navel, fuyutsuki_(kancolle), gangbang, gloves, grey_eyes, grey_hair, grey_headband, group_sex, hair_over_breasts, headband, hetero, holding, holding_phone, kantai_collection, large_breasts, long_hair, mixed-sex_bathing, multiple_boys, nipples, one_side_up, onsen, phone, pixiv_commission, rock, sex, sex_from_behind, shared_bathing, shin_(new), sidelocks, taking_picture, teeth, towel