Hortensia Saga: Ao no Kishidan (オルタンシア・サーガ -蒼の騎士団-) is a Japanese free-to-play role-playing video game developed by Sega. It was released in Japan on April 22, 2015 for Android and iOS devices. An anime television series adaptation by Liden Films titled Hortensia Saga is scheduled to premiere in January 2021. Recently a new Visual and Preview is also released.
Source - Twitter