On the day of the Tanabata festival, Shidou Itsuka happens to meet the eerie Kurumi Tokisaki, who proceeds to ask him out on a date. Although nervous, Shidou accepts the offer. The two spend their time visiting a planetarium, buying food at the festival, and trying out a mock wedding ceremony. Meanwhile, Shidou's friends—Tohka Yatogami, Yoshino, and Kotori Itsuka—are looking for him, while also enjoying the...