Gravitation is a romance (allegedly) music (allegedly) BL manga. It’s one step away from being a great parody of the yaoi genre, but unfortunately it’s wholly unironic.
It suffers from many problems. The first and the most obvious is that the story just doesn’t make any sense. Both plot-wise and character-wise.
The main problem with the duo of main characters is that they have absolutely zero chemistry. They have no reason at all to like each other, it’s as if Shuuichi got hit by a fujo brainwashing tech which makes him fall in love with the first bishounen he sees and so he did. Both Shuuichi and Yuki are also extremely annoying characters, but for such creatively different reason. One of them is a crababy. No, really, that’s like the main emotion you’ll see here, get ready for it. He’s also *really* dumb, to the point it makes you question how he even survived so far. Yuki on the other hand is the the cold one, to the extent of just not giving any signs of affection at all. He gives off the vibes of tryhard, but I’d say this is just author’s failed execution of writing a “cool” character. Author’s failure is what also seems to be behind the lack of chemistry, as it seems like she heard “opposites attract” and went with that, while forgetting that it’s because the opposites are supposed to complement each other, not repel.
Regarding the plot, it’s only for the first few volumes at most that the story maintains at least some sort of coherence. After that, it’s wild west of random bullshit. And not in the funny entertaining way, but in the “huh, the author really didn’t plan any of this through”. Conflicts that should have been main focus of the manga are solved within few pages while whole volumes are spent on filler as only once in a while the manga remembers it’s supposed to be about music.
Talking about music, it’s very obvious that the author did no research regarding the industry. And of course, don’t expect any interesting band scenes like an actual music manga would have.
Another awful thing is just the frequent tone whiplash. You get unfunny gag jokes inserted into what seemed like a serious scene, the characters randomly start being dumb, and sexual assault is treated as serious life long issue when it happens to one of the characters but as a minor inconvenience and almost a punchline when it happens to the other one. It's also pretty weird that the characters keep trying to convince others and themselves that they are not gay, they are totally straight but just happened to fuck dudes?
Unsurprisingly for the genre, the art is terrible. The characters suffer the most, as they are drawn inconsistently, a single character frequently looks differently through the whole manga (seriously, just compare even the volume covers alone) while other characters area easily mistaken with another whole different characters, and that’s across genders. The “le random faces” drawings is a cringy humor while backgrounds are almost non-existent, making this into really low artistic effort.
To summarize it, expect a wattpad story written by 13 years old level of quality.