

Daze is the opening theme of Mekakucity Actors performed by MARiA from GARNiDELiA. The song was composed by Shizen no Teki-P (a.k.a. Jin) and a PV for the anime was illustrated and directed by Shidu. The full song was released on May 29, 2014 by Jin. (Source: Kagerou Project Wikia)
It's the 1980s, and four freshman have just arrived on campus, ready to take on college life. Boy-next-door Joel, wannabe ladies man Eli, button-downed conservative Jason and handsome jock Brian soon find themselves drawn to the Omega Sig house, where their guide Mike Reno is ready to show them what fraternity life is all about.