Goblin's Promise; Invincible Love Adventure

In a mysterious Japanese fantasy world, there are various magical powers and creatures. Goblins are one of the common but troublesome existences that often harass human life. In this world, there is also a special kind of ability user who can sign a contract with the elves and gain powerful power. These ability users are called "Elf Envoys". This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.