Oka's parts: OP：たえ、香澄が走る２カット(柿木田隼人氏のニコ生にて)

appears to be referring to a cut(s) of Tae and 2 cuts of Kasumi running near the end. Cuts 9, 10 and the last cut i think?

looking at the list.. i think maybe Norita and Chizuru Kobayashi could have done some of the rest... but i really couldnt be sure.