A childhood friend who has grown up with you in the same neighborhood since kindergarten. Their parents are also close, and until elementary school, they had a relationship like siblings where they could talk about anything.

However, upon entering middle school, she developed a slightly cheeky personality, and they no longer spent as much time together as before.

Then comes spring. The two end up going to the same high school, and the story begins on the first day of their high school life, as they head to school together for the first time in a while, just like old times.