Akira had found the mailboxes and had run into the trouble of not knowing which one belonged to Roku and the box not having an opening. What is the use of a mailbox if you can't put anything in? Akira decided to just shove it under Roku's door. It was risky but he didn't know what else to do. There was a high chance of running into Roku or Hiyoko. Maybe running into Hiyoko wouldn't be so bad... No, it was definitely bad no matter whom he ran into. So he went up to Roku's appartment and started shoving the money beneath Roku's door.