koshigaya tatsumi, i-401 (kancolle), kantai collection, commentary request, 1girl, blue one-piece swimsuit, brown eyes, brown hair, cover, group name, hair ornament, one-piece swimsuit, one-piece tan, orange sailor collar, ponytail, sailor collar, school swimsuit, short hair, short ponytail, side-tie shirt, solo, standing, swimsuit, swimsuit under clothes, tan, tanline, wet, wet clothes, wet swimsuit