is a Japanese adult yuri visual novel series created by the dōjin group Fuguriya. The series debuted on November 25, 2006, with a visual novel of the same name for Microsoft Windows. Since then, a total of 23 titles have been released, with the most recent one being released on October 26, 2016. Following the success of the first game, it expanded into a series of visual novels, light novels, drama CDs, radio shows, artbooks and an anime adaptation. Plot Set in St. Michael's Academy (Mikajyo), the game follows the relationships and romance between various girls. While a majority of the games focus just on a single couple, some of the newer titles feature multiple couples. Series differences The uniforms for the high school students are auburn, with a white sailor collar, and a black bow tie, while the uniforms for the middle school students are light pink, also with a white sailor collar, and a red bow tie; the uniforms for the Next Generation series are white, with a black sailor collar (complete with a matching black skirt), and a red bow tie as well. Characters Main series Nanami is a first-year high school student at St. Michael's Academy. Her head is full of romantic feelings for Yūna. She is stubborn and involved in trifling arguments, even with her partner. Nanami is of such a lovestruck disposition that her discovery that Yūna is actually nothing like how she initially imagined her only caused her to fall harder for her. A second-year high school student at St. Michael's and chairman of the Environmental Protection Committee (a group that is functionally the student council), she is also the proud daughter of wealthy parents who are the directors of large hospitals all over Japan. Yūna is a somewhat soft-spoken intellectual beauty with a gentle disposition, with a natural gift for sports. She is a campus idol, naturally adored by her juniors and seniors alike, although she seems completely oblivious. However, Yūna is actually a rather spoilt, dirty-minded girl, especially when it comes to her girlfriend, Nanami. Yūna will not be satisfied unless she puts all her heart and soul into something. Reo is a second-year student and classmate of Mai Sawaguchi. She is socially inept, has a fear of strangers, and is known to have a very short stature. However, she acts like a wild beast, being depicted as a traditional tsundere