"The Blue Castle"
A [[yuri]] visual novel by Success, from the same line as [[Akai Ito]]. The story follows [[Osanai Shouko]], captain of the kendo team at a girl's high school on a summer training camp. The plot is heavy on back story and explanations of folklore. 

A version for the Playstation 2 came first, followed by a PC release. No erotic scenes or CG were added, though.
アオイシロ