[Machine Translation] Since Yuta first called Saki "big brother" for the first time, the two seemed to have made progress as brother and sister, but their relationship was somewhat awkward, perhaps due to their secret feelings for each other. However, due to their secret feelings for each other, their relationship was somewhat awkward. Then, various events such as third-party interviews, an open campus, and a mixed-sex study group came along, and they each had new encounters. Faced with such a nasty proposition, the two are once again confronted with their own feelings. The future and the present, common sense and insanity, pretense and honesty, their own happiness and that of their family. What is the right thing to prioritize and what is the right thing to endure? After much worry and encounter, Yuta and Saki make a "decision".