As his school’s choir club leader, 14-year-old Satomi (SAITO Jun) has only one thing on his mind – the upcoming final competition before he graduates middle school. However, his routine is disrupted when he’s approached by Kyoji (AYANO Go), a menacing yakuza with an unusual request: “Let’s go karaoke!” Baffled and cautious, Satomi soon discovers the off-key gangster needs singing lessons to avoid losing his gang’s karaoke contest and a harrowing punishment... a bad tattoo selected by the boss himself! Reluctantly, Satomi agrees to help Kyoji through a series of karaoke sessions, and the duo forge an unexpected friendship. Featuring comedic twists, heartwarming moments and of course, a stellar soundtrack, this adaptation brings WAYAMA Yama's beloved manga series to life!