Description
Ast Berg was reincarnated into another world as the final boss's brother-in-law. However, he was actually a hero who, using his game knowledge, guided his younger sister-in-law, Ertrind — who was originally slated to fall into darkness and become the world's destroyer — onto a righteous path, and together, they defeated the Demon King who had plunged the world into chaos.
However, after defeating the Demon King, he was banished by his sister-in-law as if his usefulness had run out. Now, he is hiding his true identity and working as a teacher at a remote academy. It was then that Lind, a slave who served him with an utterly doting attitude, appeared before him.
However, this slave's true identity was actually Ertrind, the very sister-in-law who banished him.
