The first portion of the movie uses a non-linear narrative to show the events of the festival from different perspectives. Key "Episode 1" Events:
Ichika balances her acting career with the festival, eventually sharing a moment and a kiss with Futaro in a park. Watch Order Context 5-toubun no Hanayome Movie - Episode 1
The story picks up after their third year of high school starts, moving directly into the final school festival. The first portion of the movie uses a
If you are looking to treat the opening of the movie as "Episode 1," 5-toubun no Hanayome Movie - Episode 1