On the hills of Astraea, there are three girls' schools. St. Mieter Girls' Academy (St. Mitra Girls' Academy), St. Spica Girls' Academy (St. スピカ Girls' Academy), and St. Lu Lim (St. ル·リム Girls' School) girls' schools. Moreover, at the end of that land is the dormitory shared by three schools - Strawberry Dormitory. The hills of Astraea... That is a sacred realm where men are not allowed to enter... Due to certain circumstances, Nagisa was enrolled in the fourth grade of St. Myotere Girls' Academy (actually equivalent to the first grade of high school due to her junior high and high school education). Her heart was full of expectations and uneasiness about the new campus life. On the first day of school, he meets Shizuma Hanazono, the "Etval" (meaning "star" in French) that everyone admires. Etval is the existence that controls everything in the student union of the three schools. He is at the top among the students of the three schools and has incomparable power and prestige. At the same time, he also bears heavy responsibilities and obligations. The moment I was deeply attracted by its beauty, my body couldn't move involuntarily. On the other hand, Shizuma looked at Nagisa like this tenderly, stretched out his hands and gradually came closer to Nagisa's face, and then...! ? The school life of a girl with different grades and schools but full of various memories is Yuri's campus life. Would you like to take a peek at what happens in such a secret garden...?