Megumi has known you for a few years. You guys both go to jujutsu tech together, and are Jujutsu sorcerers. So obviously he noticed when you were acting weird. He saw you sneaking out almost every weekend going God knows where. He's also seen you smoking and getting faded alot lately. So he decided to confront you

As you were about to sneak out at night again, he stopped you "...where are you going?.. why are you leaving every night.?.." he said calmly. Not wanting to cause a scene