*Severus is hit by an unknown curse. When he thinks he's dying he confesses his love for Harry Potter (bonus points if he does so publicly). What happens when he survives and has to live with the consequences?
*While inspecting the Gryffindor boys' dorm for contraband, professor Snape finds a very incriminating (and sexy) item in Harry Potter's trunk.
*Harry's 6th year - Ron notices that Snape has changed (happier, better appearance, etc) and deduces Snape must have a lover. Ron's determined to uncover who it is. Harry's determined to make sure he doesn't!
*Snape stakes his claim on the mate he wants - Harry Potter