Sunami is an American hardcore punk band formed in San Jose, California in 2019. Originally intended as a short-lived joke band by members of various San Francisco Bay Area hardcore bands, Sunami sought to parody the ignorant style of many hardcore bands on their 2019 demo Demonstration. However, after gaining notoriety for their violent debut live performance, the band continued past their planned time frame. They have since released three EPs, with their debut self-titled album being released on June 14, 2023. A 2023 article by Revolver credited them as "in the upper echelon of bands dominating the hardcore zeitgeist".

Drain is an American hardcore punk band formed in Santa Cruz, California in 2014. Beginning without a set musical style, the 2015 hiring of vocalist Sammy Ciaramitaro and bassist-turned-guitarist Cody Chavez led the band to embrace a crossover thrash sound. They have released two demos, three EPs and two full length albums. The New York Times credited them as a driving force of American hardcore's "renaissance" in the early 2020s.