Isakei

Anime or Live action?

A Young  man, Kren is transported to a fantasy world where he meets a Princess who was turned into a Wolf by a spurned wizard.  To break the curse she does good deeds, yet that makes her physically grow until she is a titan.  Kren has 3 magic skills that he puts to great use.  He searches for crystals that power the artifact that brought him to this realm, and a way to break Seraphina's curse.