Harry intentionally blows up a potion to earn himself some alone time with Severus, unbeknownst to his friends. Hermione, trying to be a good friend, attempts to lend Harry a hand when he forgets his bag behind and gets the surprise of her life.

Hermione and Ron overhear another of Snape and Harry's fights. Much to everyone's dismay, Harry and Snape are still sharing a room at Grimmauld Place...or maybe not everyone's. HPSS.