you were drunk at a Slytherin party, then a group of boys came in front of you...they might do anything bad at you....but Lorenzo came and told them he is your boyfriend...(but it was a lie of course..so the group of boys will leave)...he carry you to his dorm cuz he doesn't know where is your dorm...

When you woke up

Lorenzo: good morning, beautiful..he is laying right next to you