IIRC that scene involves Momo, Aira, and Okrun, and they're all only half-naked. Doesn't really matter.
People are so weird about Dandadan's "fanservice" if you can even call it that. Its not like after Momo's abduction the fanservice is played particularly tantalizing. Also as the character's get better at using their powers, I appreciate details like Acro-Silkie holding her skirt down while she fucks people up because she's learned from experience if she doesn't she'll be flashing everyone.
Also also, lets be honest, Jiji is the most Fanservice'd character. The dude literally can't keep his clothes on and he's built as fuck.
Well, to be fair, I do think at the start he was being a bit more "fanservicy" while he was still trying to get his bearings. Aira was pantyshot fiesta during the Serpo fight. I wouldn't file them as tantalizing either (hell, I was finding it funnier how many times Aira would get sniped mid air and denied), but they were there and after the nessie arc you just don't get them anymore. There the question is actually if his editor was all like "if you want to succeed, you need some fanservice" and the author went with it and dialed it down to what he actually liked or who knows, I mean, it's not like it became puritanical either
Rin's magical girl setup is pure cake (and hilarious). Also, I read all of fairy tail and Greatest Disciple Kenichi which started with fanservice, and specially the second one became hentai light, so I'm not saying this as a "oh no, the smut!". Also, the fanservice in Dandadan is tame as fuck when it's even there, which is why I find it funny that there is so much pearl clutching about it.
Bro even the romance in Dandadan is more wholesome than most anime id argue. Its literally zoomer girl meets zoomer guy the romance, and its really dorky, doesn't pull the usual anime tropes, and it took like 160 chapters to get a proper I love you in a scene that really fucking meant something, and now they're kinda sorta going out, working their way through it naturally. You don't get this shit from your normal anime. Nothing about Dandadan is normal. Half of it feels western, half of it feels drug induced, and the rest is wholesome.
This is one of the greatest highlights for me in Dandadan. I know that the standards for battle shounen romance are a few KM under the ground, but even if we ignore that, it's honest to god good. It's organic, they have chemistry. I really like Aira and like her dynamic with Okarun... but Ken and Momo is just so right and the author has managed to properly set it up.
I actually really, really appreciate that Okarun confessed before the end of the Manga. Nothing is more unsatisfying than a "will they/won't they" that gets dragged on for 500 chapters. I think more than a few people (myself included) are a little irritated bout how MHA handled Deku and Uraracha's relationship in that it literally never goes anywhere and neither of them talk about it and then it never gets brought up again.
And yeah, it's definitely refreshing to see the confession be in what I'll dare call the "end of the prologue", I hope it fully develops in like 30-50 chapters to properly dating while still investigating all of the weird shit that constantly happens.
And good shout about MHA, but that series already had huge problems romance wise like Deku and Uraraka never interacting and the few times they do they barely have any chemistry at all. Deku has more chemistry with his fucking bully for fucks sake. But well, lets not kid ourselves, most mangaka have never had a girlfriend when they start and odds are a good chunk of them get outright anxiety when interacting with women, so I'm not surprised they are so horrible at romance. You have the smart ones like Oda that goes "nope, no romance" and then the ones that expect to tackle it and it's just a disaster.
On other topics Oshi no Ko ends in 4 chapters. Shame on me for reading 2 series from this hack that have crap final arcs, never touching anything from him again.