Two people of "the Miyu" which I am shy with straightness, and is a spoilt child slightly and "the Anna" which I am active and am full of Koukishin, and are omase slightly are relations of the good friend who is always in childhood friends. However, one day is big from the just trifling event that happened, and change, and the extremely normal friend relations change "Anna" and "Miyu" into an adult; and Iku…. Thought to increase whenever such Koss ri matches, story of the small Ren of girls of the small chest, all four parts.
