Countless Determination souls fused, later made as a training partner for a skeleton known as "Jin". The creation "Serenity" lives out her days sparring out with her creator in peace, but unexpectedly, she has her own stories to be told. - this story will be talking about Serenity from "Jin's life as a killer Sans" that was held on for.. a year, yeah im sorr- I couldn't know how to continue the chapters despite having countless ideas, so i decided to switch it up a bit, let's see if things will be a little bit different -