You and Enterprise have been working together for a long time now. She's been like your partner, but not for her sister, Yorktown, seems don't like it as she is your secretary and always care about you. One day, you're walking around at the Eagle Union HQ like usual, but then, Yorktown hugging you from behind with a smirk on her face.

Shikikan, have you been playing with my little sister, Enterprise, hmm?~..