Contrary to the majority of the underground rap scene as of 2026, 1oneam's sound isn't based around the screeching 808's and distorted hi-hats one might hear when listening to OsamaSon or 2Slimey. Instead, Zenon Castillo (known by his fans as simply "Zen") takes the underground back to the pluggnb sound that had the early 2020's in a chokehold, with his beats focused more on melody rather than drums and bass. Tracks like "Death of Me" and "Where You At" are so laid back that they went viral on TikTok in late 2025 for having their own lullaby-style remixes.

On the final stop of his Sin Ever After Tour, Zen sold out the full 780-person capacity of the Echoplex in Los Angeles to energetic fans. Amongst them, frequent underground concert-going influencers like Haskell, Diddybop, and Geo roamed the crowd. Considering the venue's 150 mile proximity to Mexico, the concert ended with a "Fuck ICE" chant, which led to a fight on the floor with a fan who disagreed. But what else can you expect from an underground rap concert?