Koukoku Gaisha Danshi Ryou no Okazu-kun

Kazu, Keisuke, Ippei and Tadashi all work at the same advertising company and stay at the same company dormitory. They struggle to deal with their customers, but they like working in advertising. Their only outlet to relieve their stress is to have dinner together on Fridays.
(Source: AsianWiki)
~~ Adapted from the manga series "Koukoku Gaisha, Danshi Ryou no Okazu-kun" by Otokuni.