Convinced that she's asking him out on a date, Itsuki doesn't hesitate to agree to go out with Rina. But instead of it being a date, they go to an offline PSO2 event.

"You, too. No PSO2." Itsuki arrives at a hot spring with the other members of the student council on the student council overnight trip. Not only that, but the inn is run by a couple of his PSO2 friends. Just as Itsuki is about to stretch his wings and enjoy some PSO2, Rina tells him he's not allowed to play. Itsuki has been playing PSO2 obsessively since he started, and his grades have dropped. At the hot springs he finds himself surrounded by problem sets prepared by Rina. Once he finishes studying, he can finally take a dip in the outdoor bath, but someone unexpected appears there.

"He's awakened..." Mika was seen within the world of PSO2. Aika's strange behavior after Mika's return. Itsuki finds the situation suspicious and begins investigating Aika on his own. But from an outsider's perspective, it looksl like Itsuki is chasing Aika around. As Rina and Itsuki make rounds visiting each club's president to make the after party a reality, Aika occasionally comes up in conversation. Itsuki asks his PSO2 friends and keeps looking for Aika, which irritates Rina. Meanwhile, they hear rumors that PSO2 players sometimes go missing.

"Today and tomorrow let's do our very best to make this the best school festival possible." Itsuki has two lives: fightings against Darkers and high school. Preparing for the approaching school festival and the after party Rina's always wanted to hold has Itsuki exhausted. He does his best to avoid causing any trouble for his fellow student council members, but Rina realizes what he's doing. She asks Aika why Itsuki is so tired, but a series of conversations breeds only more misunderstandings. Itsuki is too busy to even resolve the misunderstanding, but he still does his best as the days pass. The day of the school festival, the Seiga Academy school festival begins with an announcement from student council president Rina. But in the darkness, unbeknownst to anyone.

"Making the school festival a success with the student council president... Isn't that right, vice president?" With the help of Kota and his other PSO2 friends, Itsuki and Aika arrive at the Dark Falz. Meanwhile, in the real world, the student council members and their classmates are doing their best to make the school festival a success. All that's left is to wait for the star to return. However, the obstacle standing in their way is immense and overwhelming. Itsuki and Aika struggle to find a way to rescue Rina from the Dark Falz that now wields overwhelming power having acquired a vessel. With the ARKS attack approaching as well, there's no tiime to lose. Itsuki takes his chances and enters the Dark Falz in an attempt to rescue Rina.