2girls, 4koma, brown_eyes, closed_eyes, comic, gradient_hair, half-timbered, light_purple_hair, long_hair, lying, multicolored_hair, multiple_girls, naked_towel, on_back, onsen, open_mouth, ponytail, sidelocks, stomach_bulge, sweater, towel, turtleneck, turtleneck_sweater, water, you're_doing_it_wrong