Synopsis: How to make an invisible man.

Shinji Saitou despises living on the dull island of Iejima and yearns for a more exciting life. He often pulls pranks to alleviate his boredom, but one altercation leads to him being expelled from school. After receiving an enigmatic message promising to solve all his problems if he replies, he becomes an "invisible man," but initially, he sees no change in himself. However, the following day, the classmate he punched does not recognize him, and Shinji meets Miki, the only person who can see him. She identifies herself as an invisible woman and confesses to sending him the message, which will erase him from everyone's memories, allowing him to live freely. But as even Kana Sodegi, his best friend, forgets him, Shinji realizes his mistake and must rectify it to reunite with his closest companion.