Teru lost her brother Souichirou, her last family member, and has nothing left but the phone he gave her. Then mysterious emails arrive from someone calling themselves Daisy, offering comfort and protection when she has no one else. She clings to these messages like a lifeline, never knowing who's actually on the other end. When Teru accidentally breaks a school window, she's forced into a work agreement with Kurosaki, the gruff custodian who seems determined to make her life difficult. He's blunt, demanding, and treats her like a nuisance. Yet beneath his harsh exterior, Kurosaki quietly looks out for her. His small acts of kindness contradict everything about how he treats her face-to-face. As Teru copes with her grief, questions multiply. Who really is Daisy, and is there more to Kurosaki than he lets on? Romance and comedy mix with the drama of a girl whose life begins to change after meeting him.