OVA
The Lion Agency and the Taishi Bureau have conducted a joint investigation on an unidentified marine accident occurring in the sea area around Itogami Island. On the other hand, Kojou wakes up after hearing a voice. The spectacle that jumped into his sight, whose memory was also dim, was a blanket and a cheek that seemed to have been wrapped and sleeping, cheeking, and Yukina's face appealing with tears. "Senpai ... I lost something important ...".
Aired 29/01/2020EP 1 - OVA
Strike the Blood: Kieta Seisou-hen
While several of the girls investigate Vatlers ship afloat, Akatsuki and Himeragi wake up alone in the school gym with no memories of the day before and no explanation for why they were asleep on the same futon and why Himeragi is wearing an old-fashioned school PE uniform with bloomers. A bloody baseball bat and missing weapon soon deepen the mystery as assorted forces race to solve the mystery of the empty boat, the bloody bat, and the purple bra in the MCs pockets!