Onii-chan, Kiss no Junbi wa Mada Desu ka? Ecchi no Junbi mo Mada Desu ka?
Original title: お兄ちゃん、キッスの準備はまだですか？ エッチの準備もまだですか？
The long-awaited summer vacation came a few weeks after younger sisters Asahi, Mahiru, Yayoi, and Saya became even closer to their older brother. It’s the beginning of the happy days when he gets to be with his younger sisters all day long! Trading lots of loving kisses during the day! Choosing who gets to bring him a midnight snack and spend the night together with a kiss! The summer vacation in the Seguchi household has just begun!