A morose young boy initially seen in the company of Reira during the segments depicting the future. It is implied that he is Takumi's son and Satsuki Ichinose's brother. He is living in London with Takumi and does not want to return to Japan. In the future, Reira apparently has given up singing, but will sing when Ren plays the guitar for her, something she used to say of her former band member and, possibly, his namesake, Ren Honjo. There is the possibility that he is Hachi's first child, and bears resemblance to Nobu maybe due to being Nobu's rightful son.