In pixiv Taiyaki tagged this work with 女子高生Girl's-High, and I thought this work may actually setting in the same universe of that manga by OSHIMA Towa. Kinda disappoint that this is probably not the case.
She could be Suzuki Yuma, or at a stretch, Himeji Kyouko (some images of her don't have her hair all wavy or braided). Yes, I want to believe. It worked for Agent Mulder.