Half Paper Imperial Agreement

"My grandfather said before he died: Living is not a loss. But he didn't tell me that living is more difficult than dying." Breaking off the engagement, stepping on someone's face, and being useless for three years. At the moment of awakening, the Demon Emperor's memory returned. But he found that his grandfather's grave was empty. Above the nine heavens, there was a withered skeleton that had been waiting for him for 30,000 years. This is not a revenge story. This is a game that started 30,000 years ago. ---