Let This Grieving Soul Retire, Vol. 4 (manga)
"That guy is, without a doubt, a total beast." Although Krai and crew may have gotten out of the White Wolf's Den alive, it's too soon for celebration--something even more dangerous may have escaped with them: Sitri's Slime! But while Krai is preoccupied with the elusive monster, another brewing threat decides to make its move. Can Krai handle the looming crisis--even if he doesn't realize the trouble he's causing all around him?.