It's the ball day. The famiglias all come to the Vongola castle, the host of the party. Each boss take their single son hoping the princess will be impressed and date with their son, while praying their son don't do anything stupid and enraged the Vongola.
Each mother had teach their sons how to court and treat a lady. Each father had warn their sons to behave, never hurt or upset the princess, less their family destroyed financially or socially or even physically. They knew the Vongola is a fair family, they won't harm you. But if you give them a reason to, you'll be humilated or destroyed, according to your sin to the family. And they're sure if you hurt or upset the princess of Vongola, it's more than enough reason to. Not to mention the other enraged allies that also favor the princess.
As the party start, they found out that the inner family had taken it to themselves to never leave the princess alone. So their son can not progresss much. And they're in halfway to torn their hair out as it means their son couldn't wooo the princess much to their frustation. But some thanking it, for it also means their son couldn't hurt or annoy the princess, which will incur the wrath of the family and close allies, which spell disaster for them.
Half way through the ball, a brave or fool man manage to give groop the princess. Of course it's not appreciated. The illusion siblings, Mukuro and Chrome, whom beside Tsuna as the others has something to do, give him a nasty glare as Tsuna squek in surprise. In few seconds, all kind of weapon the family use pointed at the fool man before he's spirited away by Daemon.
Then the party has disbanded here and then. The member of the man's family began to pray that he'll come somewhat intact to be buried at least and really really hope that will not make their family in the Vongola black list. In their mind, that member, although the first in line heir, as good as death. Fortunately there is another heir, his younger brother. They really has to educate the last heir from main family more stricly in manner when in presence of the princess.
The Family is quite merciful. As their victim is an heir of one of their allies, they return him somewhat intact. The only change is that he's jumpy and very scared of anything related to women especially girls. It seems it has become a warning, as all heirs were educated more stricly in manner, especially manner during ball and around the Vongola. The one whom more intense in trainning the future heir is the one who only has single heir to succed their line.
The incident is noted as the incident that give a new rule while attending Famiglia's ball, never disrespect women, especially the ones from Vongola. They had to make it like that as the powerfull famiglia and closed allies of Vongola Famiglia has women as heir or closed relation to the princess. Not that they care, but they can't punish someone without stating the obvious right? So, it has to be a little obvious knowledge to not hurt the princess but not written which princess specifically.