In a corner of the city, two cousin sisters from the countryside suddenly move into a tiny 4-tatami mat room. The already cramped space is now filled with the two busty sisters, making life as a trio incredibly difficult. Their paths constantly cross, making close contact unavoidable, and it's impossible to suppress my ulterior motives! – 都会の片隅。4畳1間のめちゃ狭いワンルームに田舎の地元からいとこ姉妹が突然転がり込んできた。ただでさえ手狭な部屋で空間を圧迫する爆乳の2人と始まる3人暮らし。生活動線は常に交差、密着不可避の日々に下心が抑えられない！