Don't Go Mikey

When Leo has a fever-induced nightmare, he can't seem to shake the memory of it. It takes a few months to figure out why. As he finds that his dream is beginning to come true, he does his best to stop the destruction of his little bro before it's too late. WARNING: A BIT OF GORE AND EXTREMELY SUGGESTIVE IF NOT IMPLIED...

The Angel That Hoped | Undertale | Sans x Reader

W.D. Gaster, the royal scientist for King Asgore. He has done many experiments, most being successful, though some ended in failure. This time, Gaster has been working on an experiment to create living monsters! He has been successful once, creating a beautiful child with wings that he wishes to give to the king. The...