Tenka Touitsu Koi no Ran: Shutsujin! Saika 4-nin Shuu
Japanese title: 天下統一恋の乱~出陣! 雑賀4人衆~
Alternative titles: Tenka Touitsu Koi no Ran: Shutsujin! Sanka Yoninshuu
Type: ONA
Source: Game
Episodes: 4
Status: Finished Airing
Aired: May 28, 2018 to Jun 26, 2018
Duration: Unknown
Rating: PG-13 - Teens 13 or older
Studios: UWAN Pictures
Genres: Drama, Romance
Themes: Historical, Samurai

15th Century Japan is ravaged by constant wars, as the lords of the realm seek to rule the land. Having lost your father in battle, you are working in the restaurant he left your mother and little brother...when an evil magistrate sends your little brother away...to become a poison taster! To save his life, you disguise yourself as a boy and go to the castle in his place...but what awaits you there is so much more!

"I'll show you all...my divine rule!"

In the Sengoku era...love is the most dangerous battle of all! 

(Source: Voltage)