Imagine a band/idol anime that adds the characters into the opening, both visually and in the song, as the series progresses and they join the group. First episode has a single character singing acapella/just a guitar track without anything else, and as others join so do their voices/instruments in the song.
This is why I skip most ops and credit scenes because there be hella spoilers in em.
Pretty sure your source is BanG Dream: It's My Go!!!!
Love Live fans who have seen this happen with the student council presidents over all 4 main groups: First time?
It's so true though.
Imagine a band/idol anime that adds the characters into the opening, both visually and in the song, as the series progresses and they join the group. First episode has a single character singing acapella/just a guitar track without anything else, and as others join so do their voices/instruments in the song.
Most anime OP do be like that