QUADRANGLE first started as a personal project of Hideo Nekota, but kept it silent for a while. In 2016 a new member joined the group and the band resumed. QUADRANGLE’s first single, REASON TRIANGLE became the opening theme song for the TV anime Joker Game,produced by Production I.G.(original novel by: Yanagi Koji, Director: Kazuya Nomura). The anime will start TV broadcast in April 2016.