Itsuki Tachibana is just one of the many students at the illustrious Seiga Academy. However, his life changes completely when the lovely Rina Izumi, Seiga Academy's flawless student council president, hand-picks him to be her vice president! There's just one catch: in order to completely fulfill his role, Itsuki must master the online game PSO2, or Phantasy Star Online 2! As Itsuki takes his first tentative steps into the game, little does he know the secrets that lie in wait for him…

Adaptation of episodes 1–3 of the 5 total episodes from the Phantasy Star Online 2 game along with original content.

Episode 1: During their qualification exam in planet Naberius, the player and fellow ARKS trainee Afin were attacked by vile organisms known as Darkers. This is followed by the two discovering a mysterious girl who lost most of her memories, and the truth regarding Naberius and the recent spike of Darker activities.

Episode 2: The plot follows the player and Matoi as they try to unravel a dark conspiracy regarding the origin and purpose of ARKS.

Episode 3: The discovery of the planet Harukotan brought a new quest into the fray, as the peace between the Shironian and Kuronites that dwell in the planet is disturbed by the Kuronites' sudden attack. The newly-reformed ARKS is tasked to investigate the reason behind it all, and it seems like the truth is more complicated and horrifying than expected...

[Source: phantasystar.fandom.com]