1girl, bangs, bare shoulders, bathtub, blue archive, blush, breasts, collarbone, covered navel, feet out of frame, hair wings, halo, head wings, holding own arm, indoors, koharu (blue archive), long hair, low wings, one-piece swimsuit, open mouth, pink hair, red eyes, shiu kyu, small breasts, solo, standing, swimsuit, twintails, white one-piece swimsuit, wings