両手に妹。どっちを選んでくれますか? (Associated Names)

Due to family circumstances, I once again found myself living at the Tsukishiro household. There, I reunited with Sumire and Kaede, the close-knit sisters who grew up with me like siblings. What awaited me was an unexpected situation where they both competed, asking, “Do you like ‘Onii-san’ (big brother)?” or “Do you prefer ‘Onii-chan’ (big…