1. It's about 4 clans protecting city from youkai, I don't know if clan members were humans or not. Main character is boy form one of the clans. I think he has only servants in clan and no other family. He use some old pocket watch to seal or exteminate youkai.

2.Action take place in school. Main character is problably student council president. In this school is mirror world and only few people can enter it. They can enter it if they hear some kind of sound and it will unberable if they wait. Every person got some kind of power went they first enterd that world.

Oh! I think I know the second one. It's Kyokou no Ou isn't it?

Yes. Thank you. I hope the first one will be found too.

I think the first one is Hitomi no Catoblepas.

thx