Let This Grieving Soul Retire, Vol. 4 (manga)

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?