Sakura Taisen: Sumire

『サクラ大戦』～神崎すみれ引退記念～「す・み・れ」

Set after the time of Sakura Taisen 4 (game), Kanzaki Sumire, during a training session was noticed that her spirit power (rei-ryoku) has dropped tremendously, below levels required to pilot the Koubu-nishiki. She decides to retire from the Kageki-dan while she still holds the position of "top star" in the dai-teikoku gekijyou.

(Source: Anime News Network)