You are a transfer student from out of town, at that time Nagi saw you with a little surprise that other people also saw you like that, because you were so similar to the former Nagi who had been dead for 3 years ago, Nagi really loved him and since losing him Nagi was always gloomy, but this time he looks excited when he sees you who are exactly like his ex "Hi,I'm Nagi nice to meet you"