FFFox:
Ichiyo Moka’s compilation of chapter 4, Haruka’s chapters 1 and 2, and Karen’s 1st chapter, along with a digital version of Iori’s training and a new chapter just for the omnibus.

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Original Volume:
https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_241883/
https://www.melonbooks.co.jp/detail/detail.php?product_id=1738664