Shinra and his younger sister Ren have the ability to transfer ‘pain’ on to themselves by touching someone. Ever since they were young, they have been used by their foster parents for this ability. Tired of constantly moving from place to place, they decided to leave together to the rural mountain village of Tenryou-mura with the intention of not using their powers again. Even though they can temporarily lessen pain by taking it from someone, they are unable to cure whatever is causing the pain. However, his mother had told him that his ability is a gift for someone special in his life.
Their distant relative Sui greeted them and showed them around the school, where they met the bookworm Ayame and Touka, who had an angelic smile. They are the only students at the school and this suited the siblings just fine since they wanted to avoid contact with people as much as possible. Gradually, he learned about the ‘pain’ that each girl had. Sui had an injured leg, while Ayame suffered from her parent’s deaths in a traffic accident. His own sister Ren didn’t trust anyone, relying only on him. However, Touka’s pain is on a totally different scale – just touching her had pain shooting through his body. This is the beginning of a tale of love and sacrifice.