The idea of using mathematical references in relation to the love between the main characters is interesting though I must admit to being a little lost.

There isn't that much of a story here though. Sine and Tan are two good friends who are in love with each other but neither dares to express his love. Since this is a relatively short and lighthearted BL series, there is probably only one reasonable way for the story to proceed, which is that they eventually express their love for each other and end up as a couple. Unfortunately, this trajectory seems to be dragged out a little too long. This is a complaint I rarely have (usually the complaint is that some episodes suddenly become ridiculously short, like in Cupid Coach), but I suspect that the story has been extended needlessly for the sake of product placements.

The characters' behaviors after they become aware of each other's feelings are a little inexplicable. They could have just kissed and lived happily ever after. Instead, some conflicts are added in a little haphazardly: despite having no romantic feelings whatsoever for Lin, Tan behaves affectionately towards her for a moment and Sine sees it. There are nicely filmed scenes (especially in the last couple of episodes), but the cinematography doesn't make up for the weak story.

I think the filming ran into problems halfway, so the intended product could have been significantly better. It's not "better not touch it" sort of bad, however. I guess this is something I don't really mind watching though I'm not really bowled over by it.