I've read through up the latest chapter in the WN. SPOILERS FOR THOSE WHO WANT IT. The amount of bitches that suck up to MC is 1 bitch per arc I think it's Presea (elf) Hjiri (Fighter) Eclipse ( Wizard) Claire (his Student, Sword Master Same as Sasha) and Sasha this five are like in contention, Hijiri Presea and Eclipse are willing to share him with Eclipse being the main wife while Claire still too dumb to actually act with her feelings while Sasha is too locked in with the Quest but she's getting pressured by the other girls. There are other girls that liked him too but have given up/too prideful to even consider it like Robin, the guild receptionist (gold digger) and Piazzola. Yes PIAZZOLA.
For the story they are pretty much trying to conquer unconquerable dungeons. These dungeons aren't unconquerable because it's difficult but because no stupid person would try to conquer them Sasha and Haise aren't the most powerful in the world (Haise is arguably the strongest at this point) but they are the only ones crazy enough to attempt it in a long while.
As for Nobunaga, He is not THE Oda Nobunaga but an Otaku Reincarnator with the same power as Haise he Married the elf clan leader and the succubus clan leader but he couldn't have a child with them, sometime later he decided to travel to the land of demons and basically build a country there and actually have a harem of demons and had kids that inherit the country.
In Haise's case he's unhinged but is kind he actually adopted Demon kids he saved from an auction, when one of the kids got kidnapped by the thieves led by a Demon he went Ape shit and massacred every single thieves in a single night, at one point Eclipse tried to fuck with him he decided to drop a cruise missile on the fucking clan building and beating the ever living shit off her officers (all women) to the point they pissing themselves. Haise is the strongest of the current Generation of S class adventures but he's nowhere near Nobunaga as he still can't spawn a Jet Fighter unlike Nobunaga. I think the peak of his power would be a Nuke which would be really funny if we have a The Eminence in Shadow collab in the future cause Cid will go ballistic at the chance he get to face a nuke head on.
What I like about this series is that the characters aren't thrown under the bus just because Haise and Sasha can do everything the main core of cast are still relevant due to their unique skill sets and everyone get the chance to shine. Of course Haise will Aura farm here and there but he's used sparingly cause he's too broken, most of the time he's either threatening the enemy or beating the ever living shit out of them so hard you'll feel bad about it. Haise's main problem is not the lack of power but the issue surrounding the relationships he developed with the people he cared about. The main reason he and Sasha or any of the girl ain't dating yet is because he couldn't accept that the edgy him would be in a situation where he is loved and valued if he wasn't strong. While Sasha is still on her "let me finish this quest THEN, I'll think about my relationship with him". Hijiri is basically throwing herself at him to no avail, Claire is clinging to him 24/7 but he kinda sees her as a little sister while she isn't aware that what she's doing is being over clingy, and Eclipse is basically acting like the level headed wife most of the time.