good quality, !?, 1boy, 1girl, arm under breasts, black hair, blush, breast hold, brown eyes, by wa genryusui, collarbone, completely nude, dark-skinned male, erection, hetero, inverted nipples, large breasts, large penis, long hair, mixed bathing, navel, onsen, open mouth, partially submerged, penis awe, sitting, solo focus, surprised, tentacles, towel, upper teeth only, water