BIG DISCOVERY
Sanada and Yukimura's names came from here:
Sanada Yukimura, a general from some point of time in Japan
Cough, cough.
MY GOD. I can't believe it. I was just looking up Hoshi Souichirou on Wikipedia to see how old he was to compare to the rest of the -older- Harukanaru Seiyuus...
MY GOD!
This just screams BL.