"Tachibana Itsuki-kun. Starting today, I'm appointing you the student council vice president." Tachibana Itsuki is a second year high school student attending the Seiga Academy boarding school. As a very ordinary student, he lives an ordinary high school life. Shortly after the second semester begins, Itsuki is suddenly appointed the student council vice president by the universally loved student council president Izumi Rina. His first job as vice president is to investigate the influence of the popular online game "Phantasy Star Online 2" on the students' studies... Itsuki is bewildered as he enters the world of PSO2 with no knowledge of the new bonds or stories that will be born there..

"Itsuki, you're a failure of an ARKS!" Itsuki experiences the joy of PSO2 while working hard at being the student council vice president. While the other members of the student council acknowledge his talents, only student council president Rina has misgivings about his overeagerness. Meanwhile, Suzuki Aika returns from abroad to join Itsuki's class. Aika develops an interest in Itsuki and follows him, causing all kinds of problems. To blow off steam from the real world, Itsuki loses himself in PSO2. However, his coach and veteran player SORO reprimands him for paying too little attention to his surroundings. Unable to understand why he was scolded, Itsuki distances himself from PSO2 for a while, but his friend and PSO2 player Kayano Kota explains to him the truth behind SORO's words.

"This is the guy the regulars mentioned... He's the troll!" In order to experience multi-party play, the true joy of PSO2, Itsuki's friend Kayano Kota introduces him to his friends on PSO2. While surprised by the way they become their characters through roleplaying, Itsuki nonetheless experiences the joy of working together. However, he's also warned about "trolls" who bother other players with their poor behavior instead of helping them. One day, Itsuki finds himself in a group with a player who refuses to help and verbally abuses the rest of the party. He is the troll "Musashi" he'd heard about.

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.

"I'm interested in her. I guess I can't just ignore her..." Itsuki's report on the NPCs of PSO2 causes Aika's interest in him to deepen. When people see her following Itsuki around more than usual, rumors begin to spread that they are dating. One day, Itsuki and Rina head to their sister school Tensei Academy to deliver equipment to be used at the Seiga Academy shool festival. However, Aika appears there as well as though nothing is out of the ordinary. Realizing the rumors about him and Aika may have even spread to Rina, Itsuki is disappointed. However, Itsuki and Rina witness a surprising side of Aika when they stop by a shopping mall on their way back.