どうして勇者様はそんなに弱いのですか is a free iPhone game developed by SYUPRO-DX Inc. It is a role-playing game that revolves around a young boy and a female hero. The game's main objective is to defeat the Demon King.

The story begins with the young boy meeting the female hero and asking for her help in defeating the Demon King. The boy possesses a strong power to fight, and his reason for wanting to defeat the Demon King is to become a source of strength for the female hero.

In order to conquer the Demon King's castle, players must navigate through traps and defeat various monsters. Each monster has a weakness, such as fire against ice and area attacks against large groups of monsters. To succeed in defeating the undefeated Demon King, players must master the use of super special moves.

Please note that there is no actual combat in the game.

Overall, どうして勇者様はそんなに弱いのですか is a free iPhone game that offers a unique role-playing experience with a focus on super special moves and defeating the Demon King.