Aksys Games is trying to localize Hakuouki: Sweet School Life for PS Vita, the publisher said during its Anime Expo 2016 panel.
Nothing is confirmed as of yet. The PS Vita otome game first launched in Japan in March 2014.
Update: To further clarify, Aksys Games is trying to convince Idea Factory to let them license the title for localization. Aksys said at the event that if you really want it, you should let Idea Factory know so they see the demand. Thanks, June.