Shachiku OL Chie Maru Nikki

We follow the life of Chieko Tsukimaru, commonly known as Chiemaru, who is working in the sales department of a black company and tries to be cheerful and positive. Chiemaru's aim of becoming a "bari-carrying sales OL" is halted by harsh quotas, a rough work environment, a demonic boss and strict seniors.
What is the fate of Chiemaru, a "company slave OL" who joined the black company?
(Source: Japanese = NTV || Translation = MDL)
~~ Adapted from the essay book "Jiko Kotei Kan ga Hikukute Kujike Sona Toki, Ashita no Jibunnotameni yu de Tama go wo Tsukuru" (自己肯定感が低くて挫けそうな時、明日の自分のためにゆでたまごをつくる) by Chie Maru (ちえ丸).