In the real world, Hikaru has disappeared, and everyone has forgotten he exists.  Futaba visits his insane mother, hoping to get some answers..
why isn't Hikaru coming to school?
wieso kommt Hikaru nicht mehr zur Schule?
¿por qué Hikaru no vino?
¿por qué no vino Hikaru?
come mai Hikaru non viene più a scuola?
por que o Hikaru não vem pra aula?
куда Хикару пропал?