1 World travel and anime?

What world should I make him go in to it can be any world and who should be in the harem then he go into the world but anyway this is author and I will see you next chapter see you later. And you can vote on what world you want first.

[naruto]

[one piece]

[dragon ball z] (maybe)

[bleach] (maybe)

[no game no life] (maybe)

[fariy tail] (maybe)

[My hero academia]

[demon slayer]

[reZero]

[hunter x hunter]

[attack on Titan] (their is a little possibility)

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It is your choice pick or choose but anyway hey guys I hope you like this book and also can you give me more anime world to go to.