Love like you (underfell sans x oc)

So, this is going to be an underfellsans x OC. I don't know why, but I always seem to find stories with characters that are sweet innocent people, and that's the opposite of me, so I'm going to make this a story about a character that changes his heart, by showing him there is another way to be a tough person, and still care at the same time?! IDK DON'T JUDGE ME YOU'RE THE ONE READING THIS!