I've Been Killing Slimes for 300 Years and Maxed Out My Level, Vol. 4 (manga)

An invitation from Beelzebub leads to a family field trip to her homelandin the land of demons! But in the midst of such an important ceremony, willHalkara be able to mind her manners and avoid insulting the Demon King? Or willthe Great Slime''s prophecy come true?