Koufuku Shisuu (幸福指数)

幸福指数 (Koufuku Shisuu) is 40meter-P's long-awaited third doujin album. It contains tracks, sung by Hatsune Miku and Gumi. Featured is one of 40mP's newest hits, シリョクケンサ (Shiryokukensa). The mastering was done by Signal-P. It was first released at THE VOC@LOiD 超 M@STER 20.

A crossfade of the album can be heard on Nico Nico Douga.

The album is purchasable on Amazon and Toranoana.