Synchro Onchi!

Tamako Matsu is a 26-year-old OL that is searching ways to lose weight. As she starts frequenting the sports club to swim in their pool, she not only becomes fascinated by synchronized swimming, but also the muscular and hot coach, Kamata! As she seeks a new self, she leaps from the water into the future!

Note: Since 2003, this series has been published in a irregular schedule, especially since Kira was working in both Genji: Genjimonogatari and Pâtisserie Mon around 2006, with just one or two chapters getting released per year. As of 2026, it's unknown if the series is still ongoing, as the last available compiled volume was released in Summer 2009, and Shueisha only has it in its digital catalog nowadays.