Peter Grill and the Philosopher's Time Vol. 5 (manga)

THE KINGDOM'S MOST ELIGIBLE STUD IS AT IT AGAIN

No matter how hard he tries, Peter Grill can't stop tripping and falling headlong into illicit affairs. Even the women in the distant dwarven villages have heard tales of his seed! He's up to five mistresses now, and while he's trying to clean up all his messes, his sister arrives on his doorstep! The strongest little sister in the world will surely bust his balls if she discovers he's cheating. What's a strongman to do?!