The mysterious blue moon, the hidden fantasy journey under the story of pure love and romance. The ignorant young love, the hidden light of the truth, what is the secret hidden under the blue moon... In the month of summer and autumn, the once-in-a-thousand-year wonder of the blue moon ignited the supposedly quiet city. With the flow of curious people, what you see is the endless azure blue, deep, as if to wrap the whole world. With that day, you found that your life seemed to have undergone a subtle change. There was an extra clingy school girl (hey, why use only one), and a mouthless girl who had a relationship with you from time to time It’s all love), and there’s a girl who looks familiar (well...it must be an illusion) With the addition of the three of them, the literary club, which was almost only you, has become more colorful Well, even the super cute younger sister came to the city where you go to school because of family trips. All this seems to be the good luck brought by the blue moon, but as time goes by... worry-free Can the time of worry really last like this?