There's a Dungeon in My Basement 1

Ordinary life becomes extraordinary when you've got a dungeon in your basement. After the death of a grandfather he never knew, Caleb Holdstock inherits a mysterious mansion. The place needs a lot of work if it's to be liveable, but the truly strange thing about it is what's in the basement. A doorway drawn in chalk. It seems harmless at first, until a midnight encounter with a silver-haired elf proves that this doorway is, in fact, the entrance to another world. With knowledge of a magical world beyond Earth, Caleb's life will never be the same again. And the best thing about it? He can travel back and forth freely. He might actually get to enjoy it if he can juggle his multiple love interests, fend off a horde of catgirls, and master his own newfound magic.