Undertale: The Second Son (Male Reader Insert)

Many years ago, the world itself had changed. Humans and Monsters fought at war with eachother... that was the narrative at least. But a story of that magnitude is of another time.

In this time, the Queen of the monster kingdom - Toriel had birthed two twin sons - Asriel and Y/N. It was a glorious time, a time of rejoice and pride. However, not everything could stay the same forever. Two events happened with the same conclusion: Change. But one of those events brought a tragic end, and a spark that plunged the kingdom into disarray and through it all, the UNDGERGROND itself changed.

But now, many years later, the remaining son finds himself in a conflict - a conflict of interests. One that could change the trajectory of his life and the world... forever.

For better or worse... he could only see in due time.