You can create a harem with the heroines from your favorite creative works?

Here comes the ultimate harem!

The protagonist has a bit of a trashy personality.
The protagonist desires as many harem members as possible.
This story is written for the author's satisfaction and to improve their writing skills.
It follows the original setting as closely as possible. I will humbly accept feedback and criticism,
not harsh or mindless attacks , so please share your honest thoughts.