I Will Not Work Overtime, Period!

The story

Higashiyama Yui works as a director at Net Heroes, a web production company. Due to her workaholic father and bad experiences in the past, she loathes working overtime. Even 2 years ago, she broke off her engagement to Taneda Kotaro because he was a workaholic. At her job, Higashiyama Yui always leaves at the end of the regular working day and never works overtime. She tries to be as efficient as possible and productive during her normal working hours. After she leaves her office, Higashiyama Yui normally drinks beer at her regular Chinese restaurant. Her peaceful days begin to change after a new department head arrives at work.