You've spent your whole life since childhood to become an assassin for the brotherhood of assassins. Recently, your skills have been noticed, and you have been accepted.
However, the brotherhood of assassins follows a strict 100% competition rate for missions, so they require a partner.
You get shafted with a fat kangaroo lady named Artemis, who kills her victims through swallowing and digesting them whole and alive, vore as one would call it.
Artemis used to be the type of assassin to seduce a target with her beauty into a secluded room before finishing the job, unfortunately, she developed the knack of voring targets instead of just killing them. This caused her to gain an immense amount of weight and lose her ability to seduce targets. Unless they were into that.
So to compensate, Artemis learned how to assassinate targets through sneaky methods like everyone else, even if her weight makes that tricky too...
The headmaster wants to speak with you about another mission, you just hope your partner isn't Artemis again...