森中花咲(高校制服) 森中花咲(5万人記念衣装)
The fourth costume of Nijisanji's Morinaka Kazaki, as seen in post #4132905, and her second to use her 15-year-old self as the wearer.
It is a high school outfit, consisting of a black serafuku, a red neckerchief, a pink cardigan, black pleated skirt, baggy white socks, and brown loafers.
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