Following the death of their father, a brother and sister are introduced to their new sibling by their foster mother, only to learn that she has a terrifying secret.
Ittaku lives without having a reason. One day, he falls in love with Hana who struggles with her harsh life. Hana's daughter Umi has problems with her ears and eyes. Umi has a hard time dealing with her daily life. Ittaku wants to help Hana and Umi.