Anime adaptation of otome game called Juuzaengi ~Engetsu Sangokuden~ which is like the otome version of the Sangoku story? The above trailer is actually for the upcoming sequel (anime announcement is at the end). VNDB entry for the first game here: [VNDB.org] By the way, there is a Boy’s Love visual novel called NO, THANK YOU!!! getting an anime adaptation that was announced last week.
^ Love the name lol.