On a Friday night in April, the hottest show in California is at the house of UCLA’s Sigma Pi chapter. Teenagers with face piercings, ripped fishnets, and layers of studded belts slung over grommeted pants so baggy they pool at their feet are crowded in the backyard of the cavernous estate. They’re all here to watch jackzebra626 make his debut headlining performance on the West Coast.⁠ ⁠ Cigarettes dangle awkwardly from fingers as people drift toward the stage enjoying the opening lineup including Harto Falión of the N.Y.C. alt-rap collective surfgang1 and digicore savant Lucy bedroque00. But it’s clear who the star is. When jackzebra finally appears — in a discreet black t-shirt and matching baseball hat, looking every part the “regular guy” he claims to be on his 2024 mixtape King of Kings — the kids loitering on the front lawn stomp out their cigs and rush the stage. ⁠ ⁠ The mosh pit is remobilized and the walls of the Sigma Pi vibrate with bass as jackzebra, who only raps in Mandar...