An alternate Swimsuit for Hololive's Natsuiro Matsuri, as seen in post #4011741 and post #4026295. It was created by her character designer Minamura Haruki in 2020, independently of Hololive which had no official swimsuit event that year.
She wears a white front-tied bikini top and Side-Tie Bikini Bottom.
See also
- Natsuiro Matsuri (Hololive Summer 2019) - her official swimsuit costume