You, the older brother, must care for your sisters by supporting their physical health and development through various intimate methods. This includes massaging their chest areas in the bath or sleeping together while stimulating their groins, doing everything necessary to maintain their well-being. At times, you even resort to extremely bold measures—such as injecting semen—to balance their hormones. However, your efforts aren't always appreciated; your sisters sometimes find you disgusting. The reason? You walk into their room with a full-on perverted face, acting like Count Full-Erection, completely exposing your lewd intentions.