Suigin Riku, a perpetually broke scholarship student at the elite Shinryou Academy, discovers that Rei, the online friend he's been playing the VRMMO Dungeon Century with, is actually his real-life crush. When Rei is pulled into a new pay-to-win game called Grave Buster, Suigin dives in after her, fighting through the game's dungeons to get her back while untangling why it exists. This second season continues directly from the first, keeping Suigin's rescue mission and the Grave Buster mystery as its throughline.