[SPRD-229] Kyoka Ishiguro There's Something I Want to Say Before I Marry My Big Sister (Censored)

My older sister, Kyoka, who lost her parents at an early age and worked hard to live with her older brother. This summer, the marriage was finally decided, and the fiancée came to visit the Ishiguro family frequently. In such a happy mood, my younger brother is alone and frustrated. The younger brother, who grew up with his older sister as his mother, eventually began to feel more than family towards his older sister, Kyoka.