Capcom release on November 9, 2016 the official Soundtrack Album of the Monster Hunter Stories Nintendo 3DS game.
The album going to includes all the BGM songs, the OP and the ED song of the game includes some tracks of the original TV Animation too on 2 CDs. The price will be 3000 Yen + tax.
You can already pre-order it from the e-Capcom Japan: http://bit.ly/2bBZQfL