Taiho Shite Miina!

Miina and Fuuma are ordinary middle schoolers. Those two are in the same class and they sit next to each other but they always fight. One day there's something weird happening to their class and they have no idea until Momon, the captain from demon world came and told them that their desk somehow is connected to the demon world. Then Momon asks Miina and Fuuma to help him catch the monster.

(Source: MU)