STORY
The use of a "cops-and-robbers" theme sets this BL series apart from the usual stories happening in a school setting, and that enticed me to watch this. But what kept me on continuing to watch this are the wonderfully written characters and storylines. You won't find the usual all-good or all-bad characters here -- they are complex and their interactions and journeys in the series are really interesting to watch. Not using a university or high school scene in the series allows the makers to create something that's more than a love story, incorporating moral dilemmas that the characters go through as well as some relevant social issues. Common BL series plots such as coming-out-of-the-closet or unsupportive families and/or friends take a backseat (or "no seat at all") in this series, and that's fine. Although I recognize the importance of showing those struggles, other series are doing it already, and for this BL I feel like it transported me into a time when such matters are not a problem at all.

Most of the storylines were completed by the end of the series, there are some which I think were left unresolved, forgotten, or closed abruptly. But there's a good chance that you'll kind of forget those details

ACTING
Great actors working with great material equals a great show, and here you can't just say that this series is good because it has a great story -- the actors did a really good job in portraying the complexity of their roles.

MUSIC
TBH I haven't paid much attention to the music but when I did I find that the sounds chosen fit the scenes very well, so I'm only judging based on those times that I paid attention to -- thus a perfect mark.

REWATCH VALUE
HIStory always offers a different BL not only when compared to other franchises but even to their previous "seasons". The entire collection (seasons 1 to 3) showcases tons of different stories that I don't mind watching all of them from the first to the last.