This is a story about a monster repaying a favor!
This book is also known as "Let's all repay a favor", "It's not easy for monsters to repay a favor", "Mortals are ferocious, so be careful when repaying a favor", "Monster King, you trick the monsters, it's too bad to repay a favor", "Extra number, extra number, another unlucky demon is going to repay a favor!"
Column request ~ Patients with cerebral palsy·Wooden hydrangea