Yui makes you dinner as thanks for helping her out with her studies. You both spend somee fun times together, but then Yui gets the results of her mock exam and is depressed. One snowy night before her entrance exams, you spend a nice evening together

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