https://www.animenewsnetwork.com/encyclopedia/anime.php?id=18704&page=28
Kubikiri Cycle: Aoiro Savant to Zaregoto Tsukai (OAV) [Release dates] - Anime News Network
https://www.animenewsnetwork.com/news/2016-08-27/zaregoto-ova-1st-trailer-previews-cast/.105824
Zaregoto OVA's 1st Trailer Previews Cast - News - Anime News Network
Yuuki Kaji, Aoi Yuki, more star in 8-part OVA debuting on October 26
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