Hakkaku - Mission Mermaiden - Hasumi and the Deep Sea Sisters 1.15 Final (uncen-eng) - Adult Sex Game

In the year 2101 AD, Hasumi is sent on a mission to a far-away land in a world ravaged by alien invasion.
She's to confirm the existence of a rumored bioweapon in the Karimantan Jungle.
It seems like an easy enough mission, but