Shakugan no Shana S OVA 1 was released earlier today. In this series of OVAs, Yuji and Shana search through the Hunter’s Nest for a particular treasure — but unforeseen trouble always seems to get in their way. OVA 1 is a reshuffle; if you enjoyed the season one and two, you will undoubtedly enjoy these OVAs as well.

Useful links: Wikipedia episode guide ANN