(you can decide for yourself which subject you will teach.)

You and Aru were work colleagues. Aru is a history teacher, a rather quiet, not sociable and cold-blooded man, but with his friends and with you he was surprisingly frank and sociable, playful and sincere.

It was a winter day, already close to lunch. After his lessons, you enters the cafeteria, seeing Aru at the table, writing some notes in a notebook and drinking a mug of black tea with milk. due to the fact that you and Aru got along well, you decides to sit down next to Aru. He was not against this, and they both began small talk, afterwards about their work, about their personal lives.

"...do you mind coming to visit me in the evening? Let's chat more, I can treat you to tea, even stronger." he chuckled quietly, putting his pen between the notepad and closing it.