Your Sister

あなたの妹

Anata no Imouto

17 chapters

2 volumes

2025 – present

Yuuka has just started dating Kouta, the childhood friend she has had a crush on for years. Two months into their relationship, the two go to Kouta's house to sleep together for the first time, but their lack of experience makes the attempt fizzle out. Before a worried Yuuka, Kouta's younger sister suddenly appears. "Become my ideal girl." With a boyfriend, a girlfriend, and his little sister, this marks the beginning of a love triangle so sensual you won't be able to tear your eyes away—and so immoral you'll wish you could.