Office worker Retsuko lets out her daily frustrations with her job by going to a karaoke bar and singing passing metal.

Retsuko experiences a glimmer of hope when her free-spirited friend, Puko, proposes starting up her own business.

Retsuko becomes more inclined to stand up to her superiors, which backfires when she learns her dream job isn't what she hoped it would be.

Feeling she can have a happy life by marrying someone with a huge salary, Retsuko takes up yoga classes, where she meets her co-workers Gori and Washimi.

Gori and Washimi end up taking Retsuko to her usual karaoke bar, where her penchant for passing metal is exposed.

Hearing about Retsuko's troubles with her boss, Ton, Washimi uses her connections with the company president to help her out.

Ton acts uncharacteristically nice following his warning, only for him to discover who it was who reported him.

Retsuko attends an office mixer, where she meets Resasuke from the sales department.

Retsuko falls head over heels for Resasuke, becoming oblivious to how bad things really are.

Retsuko is forced to realise that she can't keep ignoring the pain she is going through.