Akito Yakahashi had an childhood friend named Namanae Yamino. He loved her like a sister and even more. One day, Namanae had to leave with her bad-ass family, running from the cops. They were both sad to leave each other, especially when they both knew that Namanae was going to forget everything she had in that neighborhood, due to her serious Memory Lost condition. So Akito made a promise to never forget about her and she had to do the same. She promised as well and gave him her lucky charm bracelet as he gave her his lucky rubber band. The family left the town, never to return again.

8 years later, Akito is 17 and is attending Leaf Tree High School. A special program was place for the school, getting every student to pair up with an anonymous student for a special project. Akito bumped into his female partner who had an unquie sense of style. Her name was Namiko Yoshanae. She reminded him of Namanae, who he has not forgotten even for a minute. Unfortanitly, she was not her... or is she?