1. Snape and Harry are in established relationship, when Snape leaves unexpectedly causing a dejected and confused Harry to begin an affair with newly appointed Potions professor Scorpius Malfoy. Then as sudden as he left, Snape returns.
2. Harry discovers Snape's love potion collection while Snape discovers that he wasn't Harry's first.
3. Snape makes Harry cry in front of the entire potions class.