Doukyusei plot
Swimming champion Jun Shibahara (Nakamura Yuichi) is performing poorly at school and his father and swimming coach also urges the boy to focus on his studies and to forget about swimming for the time being. In his depressed and insecure mood, he is delighted to receive text messages from a mysterious girl who also happens to be called Jun and who has the same date of birth. They soon become texting friends. Jun notices that he has a lot of support from the other Jun and that he can share everything he thinks and feels with her. Gradually, he falls in love with a girl he has never talked to or seen.