The Strongest Man in the World
Piena, the largest nation on the continent, is having its annual ritual dance festival. The semi-finalists and winner are allowed to compete against the previous champion, Princess Nachetanya. One of the competitors is a daring boy, Adlet Meyer.
Aired 27/06/2015EP 1 - The Strongest Man in the World

2015
Rokka -Braves of the Six Flowers-
When the Majin awoke from the depths of darkness, the deity of fate chose six heroes and bequeathed them with the power to save the world. Adlet, a boy who proclaims himself the strongest on Earth, was selected among the Rokka no Yuusha (Heroes of the Six Flowers), and he goes to the rendezvous point — but seven have gathered there. The heroes suspect that someone among the seven is the enemy, and the initial suspicion falls on Adlet.
(Source: Anime News Network)