Rudeus and Sylphy have one of the most complicated relationships in anime history. From the very start of their friendship as children, Rudeus and Sylphy were dealing with awkward situations and mistaken identities. After they spent years apart and both grew as people, things have suddenly come full circle for the two in several unexpected ways.
Source：https://www.cbr.com/mushoku-tensei-rudeus-and-sylphys-relationship/
