A common failure is turning girls into inventory items. Give each heroine a job in the party (tank, scout, buffer, cook, accountant). If one girl doesn't have a unique practical and emotional role, delete her.

Despite its popularity, the isekai harem monogatari genre has faced criticisms and controversies:

The third woman they encountered was a mysterious, agile assassin named Zephyr. She was a member of a secret organization and had been sent to monitor Taro's progress. However, as she got to know him, she found herself drawn to his kind heart and sense of justice.

While the surface-level trope remains the same, the type of harem on display has shifted over the last decade. We can generally categorize Isekai Harem Monogatari into three distinct flavors: