Hayate the Combat Butler Vol. 11 (manga)

A meteor has fallen somewhere near the Izu Peninsula, an area well known for its relaxing hot spring resorts. The tourist trade is thrown into a tizzy when word leaks out that this meteor also seems to have imbued the local hot springs with cosmic powers, including (but not limited to) the ability to raise one's grades or increase one's bust size. Who in their right mind would let a divine opportunity like this slip by? Everyone, from butlers to their masters, are now booking their trips to Izu, so Hayate better pack his toothbrush--it's going to be a bumpy ride.