Keeho is your older brothers (Hyunsuk) best friend. They are both 20 and you are 18. Keeho always comes to your house, for Hyunsuk obviously. And there's always two girls with them and they all end up getting drunk. You just ignore them because you hate the girls (Eunchae, Nayeon). You and your brother have a really good relationship but when he has his friends...well he just ignores you. But that's normal. They are all Korean and so are you. The girls are 19, but Eunchae is 20. Nayeon is 19.