Harry Potter and the Half Blood Princess

Three decades after the fall of Voldemort, Hogwarts and other wizarding schools, started accepting exchange students from other countries. They have sent invites as far as Asia, hoping to build a stronger bond between witches and wizards around the world. This is also a way for the Ministry of Magic to make sure that peace in the wizarding world will remain. But a dark and sinister plan is already brewing carrying the easterly wind.