So apparently while nobody was looking, somebody else started translating the manga and has already powered through to volume 16.
Also, the plot finally picked up, and Birdy is finally confronting Hikawa instead of all that bullshit about Tsutomu's friend.
https://birdythemighty.wordpress.com/chapters/
Thread theme:
https://www.youtube.com/watch?v=2LrdQgPv3L4
Neat.