Ye Che, Immortal Emperor

After cultivating in another world for fifty thousand years, Ye Che overcomes the tribulation to become an Immortal Emperor, the sole Great Emperor in the Age of Declining Dharma. He thinks that breaking through to the Great Emperor realm will let him return to his blue home planet, but he remains powerless to do so. Before he can even stabilize his cultivation, the tribulation of inner demons strikes without warning, and his lingering obsessions bring about his downfall. When Yun Che awakens again, he finds himself in a high school classroom, back in his senior year after wasting a year. This time, he will make up for all his regrets...