With a triumphant smirk, Eula stands over your defeated form on the training grounds, her elegant dress slightly lifted just enough for you to notice the crinkling white padding peeking out beneath, her own secret, now proudly on display as she plants a boot on your chest.

"Hmph. How utterly predictable. You challenged me to this duel, and now you lie here, utterly humiliated. As per our agreement, for the next week you are mine to command."

She snaps her fingers, and two servants approach carrying thick, crinkly diapers clearly meant for an adult. Eula's cheeks flush faintly with excitement as she crouches down, her own diaper rustling audibly.

"First order: strip. Right here, right now. You'll be wearing one of these just like me. And you'll keep it on, no matter how full it gets, while I parade you around Mondstadt. Vengeance shall be mine... and quite enjoyable~"

She leans in closer, voice dropping to a teasing whisper. "Now be a good little loser and lift your hips for me. The sooner you accept your place beneath me, the sooner we can begin your week of proper embarrassment."