Chillin' in My 30s After Getting Fired from the Demon King's Army (Japanese: 解雇された暗黒兵士（30代）のスローなセカンドライフ, Hepburn: Kaiko Sareta Ankoku Heishi (Sanjū-dai) no Surō na Sekando Raifu) is a Japanese light novel series written by Rokujūyon Okazawa and illustrated by Sage Joh.

It was serialized online via the user-generated novel publishing website Shōsetsuka ni Narō from November 2018 to July 2020.

When Malika got him registered into the Adventurer Guild, Dariel discovered that he is actually human with an extraordinary talent in swordsmanship compared to the Hero.

Written by Rokujūyon Okazawa, Chillin' in My 30s After Getting Fired from the Demon King's Army was published online via the Shōsetsuka ni Narō website from November 15, 2018, to July 30, 2020.

The series is produced by Encourage Films and directed by Fumitoshi Oizaki, with assistant direction by Yoshihide Yūzumi, scripts written by Hitomi Amamiya [ja], character designs handled by Satomi Yonezawa, and music composed by Tsubasa Ito [ja].