protector (nakajima atsushi x reader)

"I like your smile," Atsushi compliments with a smile of his own as he looks at your picture again on his phone.

Those are just four words, four words that anybody could say to anyone. If Kunikida had said it, you would have just nodded. If Dazai had said it you would probably do the same. So why does your cheeks heat up - even for a fraction of a second - when this boy that you met less then a year ago said it?