Red eyes and Prussian blue dreams

One Day Mathieu Williams met a man with red eyes and a Prussian blue shirt at his 5th birthday party that his father Francis Bonneyfoy had hosted, after that day he had never saw that man again and had forgotten all about him that is until he starts having strange dreams after that day. Disclaimer: I do not own Hetalia or the characters just the plot. Rating: M. Multiple pairings.