Kota is completely defeated in the penis comparison with his futanari sister Rui.
She is made to wear her sister’s old clothes and becomes Rui’s younger sister.
Furthermore, Rui’s futanari friend also came…
This is a masochistic comic about a brother who loses in a penis comparison and gets raped by his sisters.
Illustration: Reiji Amane
Comic 25P
![A story about how I was teaching a big-breasted schoolgirl beauty how to swim, but she was so defenseless that I couldn’t resist [with lines/onomatopoeia]](https://i2.wp.com/doujin-assets.dmm.co.jp/digital/cg/d_473738/d_473738pr.jpg?w=120&resize=120,68&ssl=1 "A story about how I was teaching a big-breasted schoolgirl beauty how to swim, but she was so defenseless that I couldn’t resist [with lines/onomatopoeia]")
