Even Given the Worthless "Appraiser" Class, I'm Actually the Strongest 7

After defeating the demon Shadow, Ein has become the new lord of Rayshik domain. But there’s no time to rest after his victory, as new demons show up trying to kill him! On top of that, Echidna appears in the World Tree hall to attack Ursula and imprison Yuri within the tree. Can Ein and Ursula work together as guardians to save Yuri?!!