Tsuna would be the first to admit that he had no idea what the base of an evil syndicate was supposed to look like beyond what he saw in movies. Yes, he had visited – multiple times – the Varia mansion, he had even helped repair it and decorate it, but he also seriously doubted that all buildings owned by criminal organizations were subjected to the same abuse.
Surely the Momokyokai (and most yakuza and mafia families) didn't shoot, slash, hit, explode and otherwise damage their homebase on a daily basis. Because while the Varia were a boon to their company with how often they called for repairs (and sometimes, for a friendly – by Varia standards - chat), Tsuna dearly hoped that they were one of a kind and no other crazies like them existed for the sake of humanity.
So no, he had no real preconception about the inside of the Momokyokai base, but did it absolutely have to be this filthy?!
While there was no rubble or chunks of torn concrete like in the Varia mansion, Tsuna couldn't take a step in any direction without walking on broken bottles, crushed beer cans, smashed and ripped boxes of energy bars and smelly remains of half-eaten fastfood. All of which was covered with an (un)healthy layer of dust and grim.
Yuck.
He felt Hayato shudder in disgust behind him. The Storm was a bit of a clean freak, so this place must be right out of a nightmare for him. Tsuna would have to be doubly attentive to make sure he didn't try to get rid of it by blowing everything sky-high.
A few levels lower, Kyoya was clearly using the yakuza to vent the anger and frustrations of the past week. Their shaking of the building and the cries were probably waking the whole neighborhood, but Namimori was an old hand at ignoring strangeness. At least the Cloud was doing a wonderful job as a distraction : there was not a single individual remaining on Tsuna's floor. The interrupted game of cards on a – dirty, like everything else – table and the upturned chairs showed how quickly the people here had left to help their colleagues.
It was almost disappointing how easy this was. Days of fruitless research and patrols ending with such a simple infiltration. Hayato looked a little dejected not to have anything to blow up, but at least Kyoya was having fun, and maybe Mukuro was too, even if he didn't encounter any opposition either. The illusionist enjoyed the weirdest things sometimes. And Chrome's confidence might increase if the operation went smoothly.
Anyway, they had checked the whole top floor and the one below it and there was no trace of Sasagawa's sister. Since Kyoya seemed to have things well in hand on his side, they had plenty of time to study the various files and cabinets. Hayato was more than happy to melt the few padlocks in their way with his Storm Flames and without touching them directly (even those were filthy. How could people live around so much grim?).
There was only a limited amount of paperwork here, hinting that this was not a very important base, but there was more than enough for Tsuna and Hayato to gather vital information for their quest to rid Namimori of criminal influences (except for the Discipline Committee's, which was not quite a criminal organization, but was definitely not a civilian or lawful one).
There would be time to study all of the files later – away from this disgusting place – so they stuffed everything in a bag that Hayato pulled out of seemingly nowhere, and went to regroup with the others. The desperate shouts of earlier had long stopped, which some might have taken as a sign of Kyoya's defeat, but they knew meant he had finished utterly annihilating his opponents.