Remember, Type-91 AP Shell is Yamato sans's forbidden secret. Whoever that know about this by unauthorized way will be sentence to death or deleted all memories about this.
Can't blame her for feeling inferior to Musashi's bronze trophies that she insist on flaunting around shamelessly, especially when she's only her younger sister.
It does seem uncomfortable through, to strap 2 metal shells on to your chest like she did. It looks more like she's trying to hold back her breast with her pads, than padding it.
urkhorrkrbleegrgle!?OwDon't ya have some pretty nice assets yerself, Yamato-sa...urrkklb!?How nice, Jun'you-chan... to have breasts as big as yours...Get drunk and forget that!!
Get drunk and forget that!!
Get drunk and forget that!! Eh...?Yamato-san, you pa...What'cha saying?