As always, Nina's having a hard time focusing on her studies, but she finds herself having to go to Subaru's school to deliver Subaru's phone. After having a heart to heart, they start opening up to each other. Soon after, the trio set out to put on their first live show as a band.

After the live show, Nina and Momoka's fight continues to heat up as they express how they feel. Nina abandons all her escape routes to seriously pursue music professionally. Tomo says she'll quit if Nina and Momoka's rocky relationship continues. Then as Nina starts her first day of her part-time job, Momoka shows up.

Nina and the others arrive at an outdoor music festival. It's a huge venue, and the large stage gets them pumped. Diamond Dust takes the stage and they've gotten better since their last show. Nina and the band absolutely cannot lose. They're going to leave their mark. It's the start of their performance of a lifetime.