Forest of Doors

A young man gets lost in the woods and stumbles into the Forest of Doors. (Idea taken from A Nightmare Before Christmas where the trees have doors on them leading to the other holiday worlds. But in this one there are doors to all worlds from fiction within the Forest.) He finds a beautiful entity that grants him a power up and a reliable but quirky companion.
With his newfound abilities he begins to explore new worlds and makes powerful enemies in the process...

There wont be a Harem but maybe 2 or 3 girls.

[Disclaimer: I do not own any of the characters or stories that appear in this story. MC is original but takes the appearance similar to a trademarked character which I also do not own. This Fic is for my own amusement so updates wont be consistent. Please enjoy it for what it is. Thank you.