A Secret Relationship Diary, Another Past Revealed Good things often come with troubles, like clouds in the moon or storms among flowers— This is a saying that illustrates how good things are often interrupted by obstacles. "Chidori" and "Nanoha" are secretly building a "secret relationship" without letting any of their classmates know. However, unexpected troubles keep troubling the two of them every day...!? The season shifts from spring to the beginning of summer. Their passionate relationship is gradually, but surely, deepening.