masaharu, asou suzune, shirase ui, ui-chan no niizuma diary, game cg, 3girls, ahoge, arm behind back, backlighting, bikini, black bikini, blue eyes, blue hair, bow, breasts, brown eyes, brown hair, cleavage, cleavage cutout, clothing cutout, day, foreshortening, from below, hair intakes, halterneck, high ponytail, highleg, highleg bikini, knees together feet apart, multiple girls, one-piece swimsuit, outdoors, pink bikini, pink bow, ponytail, red hair, standing, swimsuit, wading, white bikini, white one-piece swimsuit