Fathomless Swirls of Tsubaki in the Winter Forest

"Kamisato clan's future. The duties of the Yashiro commision. My brother should not bear this burdens alone." is what Ayaka decided since that day. So, with that determination, in the morning, Ayaka walks to where her brother usually trains, "Onii-sama, may I asked for a duel?" And thus from that day, Shirasagi Himegimi has been born. Ayato and Ayaka's sibling story.