18+ Ani-tachi ni Aisarete, Korosarete.

Mahiru lives in peace with her adoptive older brothers—who happen to be identical triplets—until the news of her grandfather's death leaves them all shaken. In his will, the deceased man states that his possessions worth 15 billion yen will be inherited by the triplet that either kills or marries Mahiru! The tranquil atmosphere Mahiru has always known is plunged into chaos as the unwavering bonds she shares with her brothers are put to the test.