The Strongest Assistant in Another World

The powerful male protagonist will travel all over the world in the mysterious alien world. His talent, his power, and his strength are unmatched by anyone. It's going to be a great adventure, there might be a harem... And the protagonist might be single or find a true love. In short, don't think that the protagonist is a fool, the protagonist is a scheming boy! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.