Friends, Rivals, or Full Blown Enemies?

Akira goes on a rant in the streets not knowing that some Go players are listening. Those guys find Hikaru, put him in the hospital. Akira blames himself for what happened to Hikaru. Once Hikaru knows the truth about what happened, he doesn't want to see Akira ever again. But what happens when Akira mysteriously disappears from his house, making it seem like he ran away?