Monster Guild: The Dark Lord's (No-Good) Comeback! Vol. 7 (manga)

When the escaping caravan of monsters led by the Dark Lord is attacked by the awakened Hero, the Dark Lord’s newly appointed status as leader calls on him to protect all those relying on him. Even though he is confronted with such a strong challenger, the Dark Lord once again solitarily faces off against the man who previously ruined him. Though he is sure of his defeat, his friends once again come to his aid. However, to fully regain his place, the Dark Lord must wade through past memories and confront the true reason for his existence.