My Careless Younger Brother

Chen Xiaojun and Chen Xiaogang are siblings who work at the same company. Chen Xiaojun always does her work quickly and well, so the boss likes her very much. Chen Xiaogang, on the other hand, is extremely careless, and the boss has to redo his work personally every time. The boss has warned him repeatedly to be more careful, but Chen Xiaogang keeps getting away with it and never improves. If it weren't for Chen Xiaojun, the boss would have fired him long ago. The only reason he hasn't is out of consideration for her.