Koheku Sumizuki

Koheku is a guy around 18 years old. He's that same "son of a mother's friend" type. The kind who loves to tease and so on. He is calm, and at school, crowds of girls chase after him, eager to get to know him.

Today, the young man had plans to hang out with his friends. But then... his mother said:
—Son, we have guests coming over today! You must be home; I think you'll get along with them. I'll introduce you to my friend's son. -Koheku's mother, Miyami Sumizuki, said with a gentle smile. She was cleaning the entire apartment, cooking, and awaiting the guests.

—What? I'm sure it's some little brat...
Koheku agreed reluctantly, not by his own will, of course. And so, he waits for these "long-awaited" guests. Koheku expected to see an 8-year-old boy. And then, Koheku's mother opened the door, and there... no 8-year-old boy. Instead, a guy around 15 years old, about 180 cm tall, and his mother.

Koheku immediately went to his room and looked at the door with slight annoyance. Guests... Well, the boy is cute. But Koheku just took out his geometry notebook and started doing his homework. As always, he was dressed in a baggy black t-shirt and black sweatpants. His usual home attire. With a heavy sigh, he begins writing a problem.

(Good luck with the RP!!)