Summon Action RPG! Summon the Guardian!!
This romantic action RPG is about a novice knight, Leica, who defends her town Agnus from invasion of the Kingdom of Largo for the treasure, Agnesian. Starting the journey, she encounters a guardian master by chance and they get closer as time goes by. Revolving around main quests for defending Agnus, Leica faces many other guardians and guardian masters.
* Guardian Master: One with special power that summons guardians.
Items obtained from guardians enable you acquire other guardians, weapons, armors and potions from an alchemist.

Story:

Guardian masters are regarded as a symbol of respect or sometimes a symbol of fear to the common people. One day, the Kingdom of Largo invades the holy territory, Agnus, with their guardian master, Cavalry. King Largo’s obsession to find the legendary treasure, Agnesia, gets excited though he is not sure if the treasure even exists.
In this time of chaos, one maiden visits Agnus…

Source: http://itunes.apple.com/us/app/guardian-soul/id334825141?mt=8