The Villain Saint is my secondary account

"The blasphemous saint, the cruel tyrant, the silver-haired witch who spreads death, the messenger of Ragnarok, the evil god of the end of the world... This boss's title is too exaggerated!"
"The only hidden mission - Suppress the evil god, danger level - unknown... Oh my god, is this really something our Silver Adventure Team can conquer in advance?"
"Don't worry, let me do it. I can beat you as much as I want."
"Huh? Are you so sure you can beat him?"
"Of course, I can win even if I let her use one hand."
"why!?"
"Because she is my trumpet."
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PS: The introduction is weak, please move to the main text o(╥﹏╥)o
It is stated in advance that this book is mainly based on the main plot, but there is a love line setting: the male and female protagonists will be each other's CP, and each of them will have multiple female CPs (harem elements)