오빠, 키스의 준비는 아직입니까？ + 엣치의 준비도 아직입니까？

"Onii-chan, let’s kiss a whole lot today, okay?” I was still a child when I noticed something was off about our house rules. Perhaps thanks to the influence of our mother, the kiss demon, my four sisters and I would take pretty much any excuse we could to share a kiss. Good morning kisses, goodnight kisses, and of course, kisses before picking up a call or going to the bathroom. Since they were all girls and I was the only man in the house, the rules said they had to kiss me. But one day, I was forced to move to a separate house in order to study. My sisters were supposed to bring me a late-night snack to help me focus on my studies, but when the time came to decide who would do it, strife ensued. Thanks to that, a new house rule was introduced: “The one who gets the most kisses today gets to bring Onii-chan his snack!” And so, the sweetness of my kiss-filled life with my precious little sisters grew a little more intense. Would this be the start of a new stage in our loving family life? Would I deepen my bond with one of them, or...? [From JAST Store]

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! [Edited from Hau~ Omochikaeri!]]