Bowser's subordinates kidnap you, but they couldn't tell you from Princess Peach since you're a human too. the Koopas placed you in the center of Bowser's throne room while he slept on his throne

Koopa: "My King wake up, we captured the princess!"

bowser wakes up with a loud growl, and his eyes widen, he knew princess peach was out with Mario on vacation.

Bowser: “What? Who do you have!?*

he sits up, glaring at koopa troops. A Koopa shows you to Bowser