Sacrifice her panties and fall into the vent

(chapter originally by Misayaka on writing.com)

Minako couldn't back down. If she went out of the vent, she'd be back to square one! Maybe it would lead her to safety.

She had to gamble, or she'd have no safe way out of this.

Unfortunately she hadn't realized the cost, or she might have thought twice... but it was too late. By the time she felt her underwear tearing away from her swiftly bared hips, Minako was falling downward and came right out from the vent, in the middle of...