An Invitation for This Knucklehead!.Vanir gives Kazuma the choice of either selling the intellectual rights for his real world products for a one-off payment of 300 million eris, or maintaining a profit-sharing contract of 1 million eris a month. Not wanting this new sense of wealth to distract him from adventuring, Megumin proposes that everyone go to the Arcanretia hot springs to heal Kazuma's previous injuries...