I've been saying that the past few years have seen something of a renaissance for the beat em up genre, with the likes of Streets of Rage 4, Ninja Saviors, and Fire Dragon Fist Master Xiaomei all being excellent games that both revived the genre after years and years of diluted efforts, as well as bringing their own new ideas to the table. But Wired Soul predates them all, having come out in 2015 (according to its DLSite page, there might have been a physical release before that).
I've got some bad news and some good news regarding Wired Soul, though. The bad news is that it's not as good as any of the games listed above. The good news is that those games all set an incredibly high bar, and it's still a good game that's definitely worth playing. On first sight, it'll all seem very generic and basic, with the "girl getting kidnapped" plot and the strange lack of grappling or throws, but the more you play, the more you realise that there's a little more under the surface.
I guess the devs disregarded grappling to focus on combos, since as you'll eventually discover, you can chain a bunch of attacks together, and it's very satisfying to do so. It also manages this with only one attack button! You get your regular string of attacks by going up to an enemy and repeatedly pressing attack, and obviously, there are running and jumping attacks, too. But you can also perform more powerful autocombos by holding the attack button to fill a charge meter, then releasing when an enemy's in range. Not only that, but you can actually attack twice while in the air, plus you can hit an enemy once while they're on the ground.
With a bit of skill, timing, and aim, you can, for example, perform your charged autocombo before jumping up and kicking the enemy another two times before landing beside them and getting a sly ground punch in before they get up. It'll take a fair bit of practice before you can do that kind of thing reliably, but it's very satisfying every time you do pull it off. The only real problem the game has is the difficulty, that feels slightly unfair. For example, it seems like enemy attacks, regardless of whether you're doing a special or who attacked first or anything else like that, always have priority over your attacks. Furthermore, a bar of health doesn't seem to go very far, either: it'll only take a few hits for you to lose a life, especially against bosses. They aren't game-killing problems, but they're a bit annoying, and they stop the game reaching the upper echelons like the ones listed above.
Wired Soul is a game where the positives outweigh the negatives, though, and I do still recommend it. It was clearly a passion project for the developers, and not every game has to be a senses-shattering instant classic. If you like beat em ups, go and buy it. it's good.