1boy, 1girl, 2020, artist_name, beach, blue_eyes, blue_hair, captain_(honkai_impact), fei_luo_mao, honkai_(series), honkai_impact_3rd, horns, liliya_olenyeva, looking_at_viewer, on_floor, open_mouth, outdoors, pov, sand, shadow, single_horn, sitting, soles, swimsuit, tail, toes, twintails