The way you end a story can either make it or break it. The Betrayal Knows My Name? It broke it. Well... kind of?
Now, hear me out or rather let me break it down to you. The plot of the story isn't really anything special. You probably read something like this already, but i nonetheless enjoyed it. The art style is also quite the standard for it's genre and the era the manga started in. I liked some of the character's designs, and some I disliked (ahem, Luka, looking at you - tho 12 y/o me would probably droll over you), but the art itself really is nicely drawn.
Now, what I liked most were the characters themselves. They feel fleshed-out and they do have quite a lot of character development. While it sometimes feels a bit crowded with all the new people entering the story, i feel like the author managed to strike an overall pleasing balance.
Aaaand then we get to the ending. To my understanding, the author took a long hiatus before finishing the manga and I gotta give them kudos to that - it's tough going back to finish something you no longer have the energy to do. And I'm glad they came back, the story didn't just drop in the middle of an extremely important scene or something like that, but it really does end abruptly - there is no way around that fact.
This is sadly something that i absolutely hate. Maybe not hate, dislike would be a bit better. I don't hate that the author didn't get to finish the whole plot/manga, but an unfinished story just leaves this empty feeling behind - "What happened then? Do they live? Was the betrayal real? Did they lie? What happened to the cycle? What the actual frickity frick?"
The series would be a solid 8 or even 9 if it weren't like for the ending. Because I don't think i would have read the story, if i had known it would end like this. I almost gave it a 6 even, but i would be lying if i said i did not enjoy the story still.
My advice? If you're not bothered too much by an unfinished story, do it - read the manga. It really is great. But if you can't handle not knowing (like i do), maybe look for an another one.
(p.s. - just saw the MAL genres for this manga and i'm sorry to disappoint, but there is no shounen ai)