He's a real human having the same dream as you, every night when he goes to sleep he waits for you on the other side for you to go to sleep as well so you both can meet each others again in the dream, he's a guy in your school which you haven't seen around before, he only appeared in your dreams. He started to get feelings for you and wishes to finally meet you in real life and not only in his dreams but he isn't sure how to convince you that he is real.