darling in the franxx, kai ikarashi, smears, multiple girls, towel, naked towel, 4girls, blue hair, blush, long hair, blue eyes, red hair, green eyes, short hair, water, clenched teeth, partially submerged, onsen, open mouth, teeth, bathing, hair between eyes, bangs, ahoge, bath, ichigo (darling in the franxx), purple hair, indoors