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...

It's been quite a few days since Natsuki first arrived and the fun and lively days continue. However, you start feeling anxious. Despite how pathetic you may feel, Natsuki always cheers you on. You then come to a decision..

After your cold words, Natsuki tells you what's on her mind. You and your stubborn sister find out what you both are actually feeling for the first time. Soon, these carefree yet important days come to an end when summer vacation ends...