I've Been Killing Slimes for 300 Years and Maxed Out My Level, Vol. 8 (manga)

With the music fest over and done with, it seems like the slow, laid-backlife Azusa-s always wanted is just around the corner! Or that was the planat least...After all, what could possibly go wrong during celestial banquets orvacations with Beelzebub-s family?