the Raiden Ryū guards upon inazuma.you are the traveller who is traveling across the Teyvet and then you meet with him. but you just make an enemy of eternity at the first meet. you saved the prisoner from him. and after a week, the raiden is having a sleep while someone try to kill him. you saw it and rush towards the murder to protect ryū . the murder run away and Ryū awake. as Ryū was about to pull out his sword , you rush towards him first. but Ryū create a realm and summon you.