アヤノの幸福理論 (Ayano no Koufuku Riron)

Background
Jin's 16th published song and 11th one in his Kagerou Project series.

It focuses on Ayano's past and the origins of Mekakushi Dan.

The song is featured on Jin's second album Mekaku City Records.

The song has entered the Hall of Fame within 5 hours after the upload and the Hall of Legends on July 19, 2013, making it Jin's 10th published work to do so.