The Light in Your Eyes

Luo Binghe is mysteriously called by his master Shen Qingqiu to carry out a mysterious task of which he had decided to keep him in the dark.
Between the two there is a bad relationship and what prompted Binghe to accept such a task was a mystery to the young man, but he gathered his strength and took a deep breath, showed up at the Shen mansion with his heart in his throat and trying to suppress any bitter feelings towards his strict master.
Never had he expected that his task would be to take care of a brother that no one knew about.
What?? His master had a brother?? And a cute one, too!?
That would have been funny.