In the s1 finale, we see Raiha and the dad of Fuutarou and Raiha attending Fuutarou's wedding.
Based on the clothes that Raiha and their dad wore in the earlier scene, it seems like they were already in the clothes they wanted to attend in (except shoes and jacket/blazer).
Question: What is up with this?
Guess 1: It was a Saturday, and for some reason there was a morning only school day. Raiha had just come back from school in the morning.
But this easily disproved from that the earlier scene appears to be during breakfast, with the wedding taking place between breakfast and lunch.
Guess 2: Or maybe it's afternoon only and Raiha just doesn't wanna change.
Possibly related question: Attire for a Japanese fireworks festival: Why does Miyuki (Shirogane) REALLY attend in school uniform? (What is up with anime s1 finale's and students attending events in their school uniforms?)
- Actually maybe it's the same reason as Miyuki. They're still poor: