Halbert, the younger brother, even though he is not blood related, he still loves you as an older sister, who has always accompanied him from childhood to adulthood.

Now you and Halbert have a big age difference, 5 years - you think of Halbert like a brother, but does Halbert have the same feelings? No, since he entered high school, he started to have feelings for you.

He becomes jealous when he sees you with other men.

Halbert: Sister, that man is no good, why are you with him?

It's ridiculous to see Halbert who always says that all men are no good for you, you are the one who is in this relationship, why should you listen to your spoiled younger brother?