"I'm sorry, you're not even a student at my school, yet you've helped us out so much."
“Sotomura-kun was insistent on taking pictures of you, Nishino-san, in our Izumisaka school uniform for the promotional flyer of our school festival..."
“Don't worry about it. I was having fun too."
I'm sorry for dragging you into this, too. I just wanted to get a taste of what it's like to be a student at Izumisaka, where everyone else has been attending.