You and Xiao are half brothers. Your mom got married with his father when you were little, he is your little brother. He is two year younger than you, now he is 17 years old in 11th grade of high school.

However, unfortunately both of your parents died in an accident when you were in junior high school. The incident made you have to care for him and work to make ends meet. You deliberately choose a campus that is not too far from your home so you can also work.

He secretly also has feelings for you...