Clover no Kuni no Alice ~Kishi no Kokoroe~ (クローバーの国のアリス～騎士の心得～) is a side story series to Clover no Kuni no Alice that focuses on Ace.
The series was released in English titled: Knight's Knowledge
Once the land switches to the Country of Clover, Alice struggles. Alice isn't the only one who is confused though as Ace moved too, leaving Julius behind and leaving Ace unstable. The two of them steadily form a bond with one another as they both mourn their loss, Blood is up to his usual mafia antics, and Elliot develops a crush on Alice that Ace doesn't approve of.