Everyone is finally above ground, Sans is on his own journey into the world and He suddenly meets the girl of his dreams. Will his love be accepted? or will humans and monsters never be able to be together

After decades of being sealed underground, monsters have returned to the surface world. However, you can't help but feel that they are hiding something. What happened to Chara, the first human said to have fallen into the underground? Curiously, you journey to Mt. Ebott, only to encounter something you never thought you'd see. Or someone: Chara. Chara is referred to as (they/them). Reader is referred to as either male or female, identified as (he/she). Rating: PG 14+ for (little) explicit language, violence and fantasy violence, and suggestive/sexual themes. Last edited 03/19/19, on indefinite hiatus. Thank you for reading. ♡

This is a Len x Reader story. You were an ordinary anime fan when you found out an announcement about vocaloids and humans. What will happen when they chose you to be the project tester.