The Village Targeted By Barbarians ~NTR of an entire village Simulation~Avis

Its fun but definitely lacking in a lot of places, buggy so event triggers mysteriously. Does have a bit of grind, but after completing the ending(pretty easy) you get to unlock full gallery. There on you can just browse whatever part that interests you.

There is vanilla endings where the heroines aren't taken. And  you can even marry both heroines at once.