I was about to comment how much of an unsatisfying end it was, but this is far from It. Aoyama Gosho is not only an amazing mangaka, but one of the best storytellers.
I was nosy and i went to check when the next story featuring her was released. And it was around 13 years later. Missed opportuinty of not having that story take place 3 years earlier giving it an anniversary feel.