Invincibility Starts from Undertale

Our male protagonist is a madman. He will talk and laugh wildly from time to time, but his family does not care about this, because in their eyes, the male protagonist is just a tool that can make money, so the male protagonist has never known what family love is. But after the male protagonist died, he came to a legend that both existed and did not exist. Will the male protagonist become a real madman? Or will he become a god? Who knows? Anyway, he is just an ant in fate. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.