Mikumo and Sei have been friends ever since they were kids. They were so close that people would think they were a couple in middle... more>> school. Due to her parents job, she had no choice but to move with them to China and thus the two of them parted ways. He gave her his hat as a parting gift but she didn't get the clue behind it. A few years later, she returned to japan and reunited with him in high school. Will their first love reunite once again? <<less