Based on Namco's fantasy RPG of the same title, Tales of Symphonia was first animated by studio ufotable in 2007 as a 4-episode OVA. A second OVA, titled Tales of Symphonia: Tethe'alla Chapter, is following from March 2010. The story encompasses two worlds, each unaware of the other's existence. These worlds survive by the use of mana. The most important beings in these worlds are known as the "chosens". These chosens must go on perilous journeys while awakening the sleeping Summon Spirits, defeating the Desians, and restoring mana. Lloyd Irving and his friends Collet Brunel, the Chosen of Sylvarant, and Genus Sage, the smartest kid in Iselia set off on a journey with Kratos, a mysterious mercenary and Raine, Genus' sister. Along the way, they make more friends and discover the truth behind the World Regeneration.