The Dragon King's Nirvana

While on a mission, Lu Mingfei stumbled into an unknown Nibelung and, after touching some mysterious force, returned to the age of eighteen. Back then, the students of Shilan High School were still immersed in the sadness of graduation; Chu Zihang and Caesar saw each other as their fated rivals; Xia Mi was still in Beijing, Zero was still in Russia, and Erii was still at Genji Heavy Industries, writing her plan to run away from home... None of the tragedies had happened yet...