In volume 2, the relationship feels a little forced, like the author is using the current case with the late ex-wife to hurry along the development... It's bringing the romantic feelings into the main plot, which is good... But... The focus is taken away from the case. And the romance is now not entirely their own... Volume 2 is still amazing, but I'd like the focus to move back to the mystery and leave the romance as a subplot. Personally, I would like the author to explore Asako's past a bit more. Kinda left me hanging at the end of volume 1.