Yasuko (Shuri) is a hikikomori and has hypersomnia (trouble staying awake during the day). She lives with her boyfriend Tsunagi (Masaki Suda) who works in the editorial department at a magazine. Her frustration grows, because she can't control her emotions and her boyfriend seems indifferent to her. One day, Tsunagi's ex-girlfriend Ando (Riisa Naka) appears. She schemes to break up the couple.