series written and illustrated by Wataru Watanabe. The series have started at 2012 and still ongoing. First it was serialized in Weekly Shōnen Champion magazine...

Shimbun. 21 December 2015. Retrieved 22 December 2015. "水球リオ五輪代表に志水ら１３人 ３２年ぶり出場の男子" [Shimizu leads the 13-man water polo roster for the Rio Olympics after...