The country created by Stigma, "The Eternal Country," has emerged, and the world is being eroded. Mienlong, a hero from China, has thrown himself into a fierce battle against Amalarilku Doki and achieved victory. Meanwhile, Stigma's intentions have entered "The Eternal Country: Act 2." The newly reborn Shai, who has overcome 'Sōten Shin,' takes on the challenge!! However, Amalarilku's Sekirara transfers to Shai's middle school and ends up in the same class!? With the school as the stage, Amalarilku launches a surprise attack, leading to a tumultuous new chapter――!!