Tightly clutching his Gibson guitar, Mafuyu Satou steps out of his dark apartment to begin another day of his high school life. While taking a nap in a quiet spot on the gymnasium staircase, he has a chance encounter with fellow student Ritsuka Uenoyama, who berates him for letting his guitar's strings rust and break. Noticing Uenoyama's knowledge of the instrument, Satou pleads for him to fix it and to teach him how to play. Uenoyama eventually agrees and invites him to sit in on a jam session with his two band mates: bassist Haruki Nakayama and drummer Akihiko Kaji.

The second son of a Mafia boss, Kinn Theerapanyakul, is fleeing from an enemy when he meets Porsche, an enterprising young bartender. Porsche agrees to help defend Kinn from his attackers for a price. Porsche's martial arts skills impress, and spurred on by his father, Kinn seeks to hire Porsche as one of his personal bodyguards. Porsche is opposed and rejects Kinn’s offer despite his attempts at intimidation. It isn't until Porsche's family home and his ability to care for his brother are threatened that he acquiesces and moves onto the Theerapanyakul property. It's not a smooth transition into the unorthodox, violent job, and his relationship with Kinn vacillates between strained and playful. When his feelings for Kinn take an unexpected turn, his work becomes even more high-stakes.

Oh Yeah! Cartoons was an American animation showcase that appeared on the Nickelodeon cable channel. Oh Yeah! was an animation project guided by Fred Seibert, former Creative Director of MTV Networks and President of Hanna-Barbera. Produced by Frederator Studios, it ran as part of Nickelodeon's Nicktoons lineup, and in its second season, was hosted by Kenan Thompson of All That and Kenan & Kel fame; Then later by Josh Server, from All That, for its third season. Bill Burnett composed the show's theme music. Oh Yeah! Cartoons was distributed by Nelvana outside of the United States.

Hakuno Kishinami finds himself in the midst of a Holy Grail war with no memories of how he got there. Through his confusion, he must fight to survive.