Formed in Tampere in 2017, Coronary was created when a pair of Finnish metal veterans, guitarist Aku "Herr Lederwurst" Kytölä and drummer Pate "Batvik" Vuorio, reconnected after bumping into each other at a local flea market. Upon realizing they both shared a similar vision of wanting to create a metal band that took its influences from the ’70s and ’80s, the two men set about to complete the CORONARY lineup, eventually securing lead singer Olli "The True Herman" Kärki, second guitarist Jukka "Doktor" Holm and bassist Jarkko "C-90" Aaltonen.
CORONARY emerged from a January 2018 studio session with three songs of classic metal glory, highlighting the gritty vocals of Kärki and guitar tandem of Kytölä and Holm, the latter capable of dropping in ACCEPT-like riff tactics to match their firebrand lead guitar work. The demo is already catching fire in the metal underground, with Metal Crypt stating CORONARY “refuse to reinvent the smoothly rollin' heavy metal wheel. No, on the contrary, they want it to be untouched, letting it roll freely, the way it's been rolling in the best way since the golden era of ’80s heavy fuckin' metal.”