The reason why jigu distanced himself after hearing yeowoon's coworker called him "boss". ...

The reason why jigu distanced himself after hearing yeowoon's coworker called him "boss". Firstly, it's not boss but chief. 주임 (juim) is chief in eng since yeowoon just got promoted. Jigu misheard it as 주인 (juin).

주임 (juim) - chief
주인 (juin) - master


Jigu is so funny