[Harry Potter: Barty Crouch Jr.] Keep Him Prisoner

Barty Crouch Jr. lost consciousness on his way back to the common room.

When he woke again, a black cloth covered his eyes, and an abnormal heat was rising inside his body.

A slightly hoarse woman's voice, tinged with laughter, whispered in his ear: "I've caught you, Barty."

*Honestly, I don't even know if this counts as GxB or BxG. The woman is strong and the man is weak, but neither of the usual ways of defining who's on top or bottom based on who penetrates seems to fit.

*She shares a character concept with Gerard from The Owl That Came Too Late. But because the timelines and experiences are different, her personality may vary.

Theme: Chastity is a man's finest dowry.