Grinding My Way Through the Demon Realm

He ground so hard in his past life they literally put him in a box. Reborn as Gou Qi, the lowest demon slave in existence, he's forced into the ultimate undercover mission after a prison break gone wrong. This time? No more grinding himself to death. His master plan: complete the mission, rack up merit points, retire early, and buy that dream cottage in the human world. Too bad the demon realm has other plans for the 'King of Grinding.'