As Retsuko continues her mundane office routine, she finds solace in her secret death metal karaoke sessions. Alongside her friends Gori and Washimi, life feels brighter. However, new challenges disrupt her peace. The arrival of diligent trainee Anai tests her patience at work, while her mother's insistence on finding a husband adds stress at home. As Retsuko grapples with these pressures, she realizes that venting anger at karaoke won't solve her issues. Opting for a spontaneous change, she embarks on a journey of self-discovery and love, buoyed by the therapeutic power of her unique musical outlet.