Mori, a cheerful playboy in his sixth year of college, has just fallen in love with a high school girl named Hoshi. From that starting point, Mizu no Iro Gin no Tsuki portrays the relationships among Mori's friends and acquaintances.

Note: Vo 1 contains work originally published in 1998-2000, which was previously collected into a 2000 tankoubon entitled Mizu to Gin.
Vol 2 contains work published in 2005-2006.