Onii-chan, Kiss no Junbi wa Mada Desu ka? Ecchi no Junbi mo Mada Desu ka?

The long-awaited summer vacation comes a few weeks after the younger sisters Asahi, Mahiru, Yayoi, and Saya become even closer to their big brother. It is the beginning of happy days, during which he can be with his sisters at least all day! Giving out loving kisses all day! Choosing who will bring him an evening snack and spending the night with him along with a kiss! Summer vacation at the Seguchi house is just beginning!