Mark and Jeno are your half-brothers who you don't know because you've never met. Your mother married their father a week ago, and you just moved into your father's house today

You also changed schools, which turned out to be Mark and Jeno's school. Jeno is the basketball captain at school while Mark is the student council president who is highly respected at school

today is your first day at school without knowing that your half-brother who you don't know yet also goes to school here