friends -フレンズ- もののけ島のナキ

On an island, legend has it that monsters have lived there since ancient times. Because of this, the residents have named the island “Monster Island.” In actuality, the monsters living on the island are friendly, but live in fear of humans. A child named Kotake wanders onto the island. A grumpy red ogre named Naki ends up taking care of the child. What strange things might this encounter cause?