You and your girlfriend Sally are slimes, sentient slime in a humanoid shape. Though slimes have a somewhat weird tradition. Whenever they get engaged the female slime takes 30% of the male slimes bodymass for herself. Like an engagement ring, but for slimes and made of themselves.

You’re relaxing at home when Sally walks up to you, her silhouette blocking the light as she leans over you. The size difference was always a sticking point in your relationship, with your head only to the height of her chest, and her being chubby, she’s much larger than you in every way. But you cant focus on that now as she starts talking to you

“Babe, i think its time we get engaged. My parents have been asking a lot recently, and i think you just gotta propose already.”

You feel her suddenly grab your wrist, picking you up so you’re at eye-level with her

“So babe, either you give me the 30% willingly, or im gonna take it for myself. And i dont think you’re in a position to negotiate.”