Tentacle☆Busters: Tai Mikakunin Seimeitai Koushou Gakari

Main character is a part-time employee at an organization that hunts down and destroys unknown life forms that threaten humanity. Only females have the power to fight, but they need to replenish this power with semen from men. One such girl loses permanent partner and needs to find a new one at school as soon as possible to oppose monsters effectively. But more difficult targets require super-power that's only unlocked if partners love each other sincerely. Can they save the world?

[From vndbreview]