Umi no Aria

Colin's brother Abel, a well-liked top student, died in a sudden storm at sea, an event Colin witnessed but could not prevent. He is shocked when Abel unexpectedly returns, but it becomes clear that an alien entity has taken hold of his body, altering his behavior and making him erratic. As strange aspects of Abel's past emerge, Colin also learns that his brother has become a conduit for the musical talent of a new, enigmatic music teacher.