sentences:  At Hinata House, Keitarō meets Naru Narusegawa, who is also studying to enter the university.Naru ranks first in the whole of Japan on the practice exams, and Keitarō convinces her to help him study.As the two of them grow closer through their studies, and after Keitarō accidentally reads a small section of Naru's diary, he becomes increasingly convinced that Naru may be the girl with whom he made the promise.