i can offer up junyeong as someone who could teach him english (he grew up in the states), a hiking partner since he's pretty active, and possibly the family friend who knows that he isn't his father's son. he's a little older than taewoo, but i think it would help with him finding out either by overhearing a conversation between the adults or however you had imagined that news getting out. i'm happy to brainstorm other things or work out any details!