In the midst of office clichés, Retsuko, a hardworking red panda, occupies the role of the overburdened employee picking up slack for her lazy colleagues. To cope with the stress, she unleashes her inner turmoil through death metal karaoke sessions, finding solace in this unconventional outlet. However, as she starts to challenge her established persona and share her passion with others, Retsuko realizes that embracing vulnerability and inviting others into her world of metal music might lead to unexpected connections and personal growth.