1girl, 2boys, 4koma, bathing, blush, breasts, brown_hair, clenched_hands, collarbone, comic, crayon_shin-chan, facing_another, hands_up, happy, heart, indoors, izawa_(bhive003), kono_subarashii_sekai_ni_shukufuku_wo!, large_breasts, mixed-sex_bathing, multiple_boys, nohara_shinnosuke, open_mouth, pointy_ears, red_hair, satou_kazuma, shared_bathing, smile, speech_bubble, water, wolbach