SEE? THIS is the tiny difference between a satisfactory conclusion and a vague conclusion!
Without Minato and Bikki talking things out AND kissing, we would be left in the dark as to whether they manage to make their relationship work once the manga is finished. And when you write a romance, that's kind of an important note to leave the readers with. Now, they didn't talk about Bikki's daddy issues, and that's kinda disappointing, but we can assume they did that during the timeskip or something.
In the end, the manga setup its question and answered it, and that's something I can respect. The worse parts are those with missed potential, but for me at least, this was an enjoyable ride. Plus, Minato is my spirit animal, and Bikki has cute little fangs.
8/10, would read again since it's so damn short for such a great cast of characters.