After losing her brother, Souichirou, Teru Kurebayashi finds herself completely alone in the world, except for an anonymous person she calls "Daisy." Daisy is always there to offer kind words and support whenever Teru needs it, even though they've never met and can only communicate through a cell phone left by Souichirou. Meanwhile, Teru's life is made miserable by the rude school janitor, Tasuku Kurosaki, who forced her to work for him after she accidentally broke a window. Teru wonders if there's more to Kurosaki than his rough exterior suggests.
The volume also includes a one-shot titled "Hetakuso Cupid," or "The Hopeless Cupid."