This whole Arc has been a representation of Mitsutoshi's time in Prison.
Bambina is obviously the dumb strong guy
Fake Kaka- is someone he thought he could trust
Komatsu-Is Mitsutoshi after a attack by a rival gang.(NEO)
His Cellmates aka The 4 Heavenly Kings are trying to save him but need the help of Bambina (Big dumb Guy)
Ultimately they all realized to survive you need to touch his balls,drink his "soup"
The Tits are to symbolize them becoming his prison bitches