Protagonist System of All Realms

A certain system said, "Host, you are destined to be the protagonist. Please accept this pleasant fate." A certain protagonist, Yun Mu, trembled when he heard this, "Is this true??" "Of course!" A certain system explained seriously, "But before becoming the protagonist, I hope that you, the host, can live well until the end." "???" This is a story about a boy who accidentally gets a golden finger, travels to various worlds, and then struggles in tears until the end in order to reach the top of his life. "I'm sorry, host, this time your protagonist's key word in this world is 'worse than an animal', please feel free to let everyone despise you~" "..." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.