"You can do whatever you want with all of me." Despite her parents’ objections, university student Fuyuka leaves her strict household to attend an art school in Tokyo, leaving behind her younger brother. Ever since, she’s carried a sense of guilt for abandoning him. One day, unable to pay her rent and feeling hopeless, she suddenly reunites with her now-grown-up brother, Amane...!? Sleeping in the same bed because they’re siblings...? Is this familial love? Or is it something more―― Showered with obsessive affection by her devoted little brother...! A heart-pounding, forbidden cohabitation love story that won’t let you breathe!