Single release from MUCC for the anime series Inu x Boku SS, titled Nirvana, is the OP. Single is out on 7 March 2012. Comes available in two editions: Regular Edition and Limited Pressing.

Track-listing of Nirvana [Limited Pressing]

1. ニルヴァーナ
2. ニルヴァーナ [TV Edit]
3. ニルヴァーナ -MOONBUG REMIX-

Track-listing of Nirvana [Regular Edition]

1. ニルヴァーナ
2. バルス
3. ニルヴァーナ -MOONBUG REMIX-

Single Title: Nirvana [Limited Pressing]
Catalog Number: AICL-2359
Release Date: 7 March 2012
Retail Price: 1,223 yen
Preorder at: CDJapan

Single Title: Nirvana [Regular Edition]
Catalog Number: AICL-2358
Release Date: 7 March 2012
Retail Price: 1,260 yen
Preorder at: CDJapan