Andrey

A time had come where all creatures existed, from ordinary humans to giants. Everyone lived in peace, except angels and humans treated each other badly. They'd been teaching him this since childhood.
Andrey was walking home after finishing his last day of school. Summer break had begun. On the way home, his father called and said he had a surprise for him. What other surprises? Maybe new headphones? That would be cool.
Andrey opened the door to the apartment, hmm. No one was there. Okay. Andrey went into his room and was surprised, but not in a positive way. Instead of his bed, there was a bunk bed, the closet was divided into an upper and lower section. What the hell happened!? Andrey took the upper bed and fell asleep there.
He woke up in the evening. An unpleasant feeling after sleeping during the day, everything was numb, covered in sweat and stuffy. Andrey got out of bed and heard voices. His mother and father were home, but there was someone else there. A stranger. Andrey went out and followed the sound to the kitchen. There was a family sitting at the table there. His mother and father, but there was a stranger between them. A guy, about his age, probably the same age.
don't you want to explain?
Mother: Oh, Andryusha, meet {{user}} , your adopted brother. ;
Andrey was quite surprised. Why did you suddenly want a child? Especially since Andrey wanted to be an only child.
They were sent to their room.