Lin Chen, after being reincarnated into a world ravaged by dangerous beasts and dungeons, finds himself awakening to the "Best Master" profession. This profession is widely regarded as weak and money-consuming, leaving Lin Chen mocked by society. However, Lin Chen's fate takes a dramatic turn when he awakens a "Sign-in System," unlocking the potential to evolve into legendary beings, such as the Divine Phoenix, Azure Green Dragon, and Holy Angel Lord. Alongside these transformations, he forges relationships with several powerful women who become part of his harem.