Yui finally goes to take her exam with the you good luck charm you gave her in hand. One day, while you two are walking down a path of cherry blossoms, Yui tells you a secret. This will probably be an unforgettable moment for the both of you. And then..

Your little sister, Natsuki, suddenly shows up in the middle of your busy days. Apparently she came to take care of you while she was on her summer vacation. This is the story about you and Natsuki one summer

Having idle conversations and living with someone. Natsuki reminds you of these warm feelings you had forgotten about after living alone for so long. Natsuki works really hard for you, and in return, you try to reward her with a beautiful view...