Undercurrent(アンダーカレント) is a drama manga by manga author Tetsuya Toyoda(豊田 徹也Toyoda Tetsuya). The manga was serialized in Japan by Kodansha in the monthly seinen magazine Afternoon from October 2004 to 2005, and the 11 chapters were collected into a single bound volume. A French translation was published by Kana in its collection Made in in 2008.