4koma, 5girls, =_=, alternate_hairstyle, beamed_eighth_notes, blonde_hair, blush, blush_stickers, breasts, brown_hair, closed_eyes, comic, eighth_note, emphasis_lines, eyebrows_visible_through_hair, grey_eyes, high_ponytail, holding, holding_water_gun, large_breasts, long_hair, machinery, multiple_girls, musical_note, naked_towel, night, onsen, open_mouth, orange_hair, partially_submerged, quarter_note, rock, shaded_face, short_hair, sky, smile, speech_bubble, speed_lines, star_(sky), starry_sky, tears, towel, towel_on_head, triangle_mouth, turret, water, water_gun