Prepare for a full dive!The crimes of the Acceleration Research Society are numerous and unforgivable. The White Legion, Oscillatory Universe―suspected to be connected to the Society―will answer for their atrocities. After intense negotiation, Nega Nebulus and Prominence take the final plunge and become one unified Legion to confront White Cosmos and her enigmatic entourage. But Haruyuki can hardly wrap his mind around the increased might of his Legion that has now tripled in size! He’ll need to keep his wits about him, though, because the biggest surprise is yet to come… Reki Kawahara is an award winning author best known for his light novel series, Sword Art Online and Accel World.