Natsushi Aoi has had a crush since childhood. However, Natsushi kept those feelings a secret. That's because the woman he loves is almost a decade older, and she is someone he has known since childhood, a woman who now lives with him, and above all else, she is his brother Yo's girlfriend. With such complicated feelings, time passes by -- *"Why did you have to die, Yo-nii..."* The summer when the three of them played together happily will never come again. Nevertheless, summer will come again. A new summer that he will never forget.

One day, Kurose, an office worker, comes across a lost high school girl and feels he can't just leave her alone, so he brings her to his home. In truth, he fell for her at first sight, but because she's underage, he decides to hide his feelings. However, the girl is also keeping a secret from Kurose... (Source: Natalie, translated)

Chiho, a first year in high school, and her childhood friend Ikeya share a "secret." What is the secret between the two of them? (Source: Shueisha, translated)