This is what defines an almost perfect one-shot. It stands strong as it is, but at the same time you wanna read more and see more of these characters. The story is bittersweet, it's very sad, but has that hopeful touch at the end. The story of course is predictable, but that doesn't make it any less good (mainly because it's a one-shot, there can only happen so much in 40 pages). Triangle's best aspect is the pacing. The sweet moments made me feel more emotions than a lot of long-term series, this really is where this manga excels at. You can easily sympathise with the characters, theyare very realistic and don't do dumb stuff just for drama's sake.

Overall this is very refreshing, I'd also recommend this to anyone who liked Blue Flag, they have a similar vibe to them.