Complex sentence: In', which takes place after the events of the series, Naruto faces Toneri Otsutsuki; at the movie's climax, Naruto and Hinata enter a relationship that eventually leads to their marriage.
Split into simpler sentences: In', which takes place after the events of the series, Naruto faces Toneri Otsutsuki while eventually taking his relationship to Hinata to the next step. At the movie's climax, Naruto and Hinata enter a relationship that leads to their marriage.