A Journey to Build my Harem but why is it so hard?

Hi, guys im a new author so please give a kind word for reviewing cuz this story is just wish fulfillment for me and just giving you all folks a good story if that's in your perspective.
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What will you do if your long wish has come?
Will you do better than what you read? or Just be like a scum?
This story is will take you the world of man, an old man who is supposed to die but thankfully a ROB that so bored got fun with his life and gives him a wishes to die for.

Come and read with me as the story goes

Will he be a scum of society

or

A great man who fulfill his wishes and gets a love from those who he love.
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Sorry guys if the story looks boring or not up to fun cuz i said this book is my first and will be last if my imagination get blank.

1st world:Mahouka whaaaat?
2nd:?
3rd:?
4th:?
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*The cover is not mine i just see it in the google.
Credits to the owner*