Responses

Yeah, you're right "Annaka" is a Japanese surname. Made up of the kanji An=Peace and Naka=Middle/Center/Inside. So it literally translates to Peaceful Center. I think the MC just shortened it cause they are close friends? Although I don't know why he just doesn't call him by his first name? I think it's cute tho.
The art is pretty but I can't take seriously a male character who's name is Anna. ╮( ̄▽ ̄)╭