This was a nice watch for me. Here are my pros and cons:

PROS

STORY. I found it interesting and sometimes compelling, especially all the drama of Tae Hyun's back story. Da Yeol struck me as cold at first, but I appreciated his character development as the series progressed.

BREVITY. Especially now, with so many BLs being produced (including a lot of weak ones), I do appreciate a series that can get the story told without resorting to 12+ looooong episodes. Kudos to the producers.

CONS

DEVELOPMENT. There were some "huh?" moments for me: the "villain" (the guy with long hair who was bullying Da Yeol) confused me. I would have liked more from him, as I was never quite sure why he was as much of a jerk as he was. Maybe he was just a homophobe. Or maybe he himself liked one of them. Who knows? And the character of Tae Hyun's aunt (who blamed him for his sister's death!) could have been explored in deeper detail.

ENDING. The last episode was disappointing for me, but not because of a lack of a kiss (ear peck aside). What was up with "two years later," and what happened during those two years? Then we get a reconnection as a day-long date which was cute, but never developed in any meaningful way. The ending baffled me: was this another two years later? We suddenly -- with no explanation -- see Da Yeol in a military uniform, with Tae Hyun extending flowers to him from a distance. Huh?

At certain points during this series I thought I might be giving a rare 10 as a rating, because I really liked a lot of it and enjoyed the chemistry between the leads. At the end of the day, I'm giving it an 8.5.