Watch Master of Martial Hearts full episodes online English Dub. Other title: Zettai Shougeki: Platonic Heart. Synopsis: The story centers on the Platonic Heart, a jewel that—according to an old urban legend—can grant any wish when collected. Only a chosen few are allowed to compete in the Platonic Heart hunt, and high school junior Aya Iseshima is one of 11 girls and women who are taking part. More info: IMDB, Wikipedia.