1Work done beyond regular working hours; overtime work (commonly used as 残業する).
今週は仕事が忙しくて毎日残業だった。
Work was busy this week, and I did overtime every day.
残業が続くと体調を崩すので注意が必要だ。
Prolonged overtime can harm your health, so you need to be careful.
残業代はきちんと支払われるべきだ。
Overtime pay should be properly paid.