When I wake up in the morning, my ordinary daily life suddenly changes. My little sister is licking and sucking my morning wood... I panic at the situation. Even when I shout, "What the hell are you doing?!" she shyly replies, "Ah, good morning, big brother..." Her actions make it impossible for me to hold back any longer... We bring you three stories of brother-sister daily life where moe elements and erotic atmosphere intertwine.