Kanami and her older brother shared a positive relationship until their parents' tragic demise. However, the incident transformed her brother into a distant, harsh, and hostile person towards her. Feeling alone and cut off, Kanami breaks down and cries at a park where a stranger perceives her pain and offers to be her substitute brother for a fee. With her parents' inheritance as the source of her funds, Kanami agrees to hire the young man.
Kanami's rental brother helps her revisit the happy moments she shared with her biological sibling, but she yearns to restore her bond with her remaining family.
