So there are two things to it, really.
First and foremost, we updated the physics of our character.
So boobs are now naturally moving as your character moves!
And secondly, we have added a nudity DLC which allows you to enjoy the moving boobs ten times better!
https://store.steampowered.com/app/1251350/ANIME_WAR__Modern_Campaign__Nudity_DLC_18/