sengoku rance
A 2006 strategy/love simulation game by AliceSoft, and the seventh in the Rance series. Features a large cast of characters, almost all of them genderswapped or based from historical Sengoku Jidai people.
It is often considered the best game in the series, and is notably the game that garnered interest in the series overseas.
Characters:
This tag implicates rance_(series) (learn more).