I have a feeling the author actually planned to write more chapters but endend up cutting it short for some reason. The story itself was quite good and, the pacing wasn't weird or anything, but so many details that were introduced never got to be explained and the fact that they only hint at some type of romantic feelings in the middle of the story and then never again makes me think this wasn't the ending the author planned. The more serious and dramatic aspects of the story were definitely made justice, but the actual development of their relationship is non existent, I'm not even sure you could call this shounen ai
Unluckily Lucky