I love Detroit: Become Human, and I was excited to see any extension of the universe even though I don't typically read manga. Unfortunately, Tokyo Stories doesn't do enough to differentiate itself from the game and tell its own stories.
The bulk of this volume is dedicated to Reina's Story -- a tale full of potential but lacking in execution. Reina is an android who was designed to be an idol (which I think is sort of like a pop singer?), and her manager is grooming her to be the best idol ever instead of paying attention to her own daughter. There's potential here with the idea that a famous popstar could literally just be replaced if they're an android. But too often, the story feels like it's rushing through the same beats as Kara's story in the game. There's also a small tie-in to the game that establishes Reina's story as overlapping with events in Detroit, but it doesn't overwhelm the story.
We also start Seiji's Story at the end of the volume, but it barely gets going before the volume ends so I don't have any particularly strong impression of it. Seiji is an android doctor who has to deal with people who expect a human bedside manner. I guess you could say Reina was a forward-looking projection of figures like Hatsune Miku -- but I'm not really a part of that world, so Seiji's story is where I personally felt more contemporary relevance. Artificial intelligence is starting to become more involved in medicine, and I could see something like Seiji existing at some point (even if I think it's more likely to be just a voice on a computer as opposed to an android). I hope his story goes somewhere interesting and isn't as repetitive of the game plot points as Reina's.
I'm not used to manga art, so I don't feel like I'm in a good place to judge, but the characters were expressive and I enjoyed the little translations of what I assume are Japanese characters illustrating sound effects. While I'm not used to reading black-and-white comics, it wasn't particularly off-putting here.
Overall, Tokyo Stories is fine. I wish it was a little braver in exploring new plots that weren't already basically covered in the game, and I wish it took more time developing characters and letting us get to know them. But it's a basically enjoyable extension of the Detroit: Become Human universe -- if you finish the game and feel like you want more, this is both your *only* option and a reasonable one.