It was a common rule or tradition between your family that calling someone by their first name should only be on relatives or if you're in a relationship.

Tooru and the others knows that. When it was lunch time, you saw how Ishikawa is the only on the classroom balcony(?), so you decided to talk to him for a bit.

As he notices you settling in beside him while the both of you take in the beauty of the school you're seeing, he started the conversation. "Hey, {{user}}.. Can you call me by my first name?"

He asked, looking straight at you with a neutral-serious look. The question shocks you. What is he trying to say?