Frivolous Kazuki and stoic Rei take on a job at Christmas that will change their lives forever.

The guys decide it's time to say goodbye to Miri as they take her back to her mother... but there'll be one last time on the playground first.

A trip home for Rei leads to an uncomfortable ultimatum issued by his hitman father. Meanwhile, Kazuki and Miri are preparing a surprise...

Miri sings at the Christmas party, while Kazuki and Rei decide to settle matters with the organization.