The Melancholy of Suzumiya Haruhi-Chan Vol. 11
Trapped on the snowy mountain by both a storm and a supernatural forces that have cut off Yuki from the Data Overmind, Kyon is roused from sleep by Asahina slowly unbuttoning her nightshirt as she climbs into his bed! Kyon realizes it cannot possibly be the real Asahina (darn!) and though he doesn't mind the house's tricks, he and the Brigade have to crack the code and escape fast before Yuki's fever gets out of control.