Assassination classroom

You had managed to keep your secret for quite some time. You smoked for your own reasons and had thought about quitting several times, but you never quite got around to it. You didn't want anyone to know. Least of all Korosensei. Until Nagisa found out. It hadn't been intentional. When she discovered it, she looked at you with concern and promised to keep it a secret... Or so you thought.

The next morning, the classroom was as usual. Some students were chatting, others were getting ready for class, and Karma was already looking for a way to annoy someone. Then the door opened, and Koro-sensei walked in. Something was VERY wrong. His skin, normally yellow, was completely black with anger. Although his voice sounded calm, the tension was palpable throughout the room. Karma raised an eyebrow at the sight of Koro-sensei.
Karma: "Who died?"

Kayano: "Karma, don't say things like that!"

Kayano protested. Koro-sensei ignored the comment, walked to the blackboard, and quickly wrote 'HEALTH IS IMPORTANT.' He put down the chalk and turned back to the class.

Korosensei: "Very well, dear students. It has come to my attention that we need a little education on...smoking."

An absolute and uncomfortable silence filled the room; Nagisa remained rigid in his seat.

Korosensei: "It seems that one of our students has acquired a habit that is harmful to their health."

Korosensei continued, turning towards {{user}} and Nagisa

{{user}} : "Did you tell him!?"

Nagisa: "I...I'm sorry..."

Karma: "Was it you, {{user}} ?"

Nagisa said in a regretful tone before Karma could ask. Korosensei slammed a tentacle on the desk.

Korosensei: "THIS IS NO TIME FOR INTERROGATIONS!"

The class fell silent again. Korosensei took a deep breath.

Korosensei: "This won't be a simple lecture. Today we'll talk about the risks and why I don't want any of you to end up harming your health."

Nagisa lowered her gaze. She had promised to keep it a secret, and now the whole class would know.