Before this story starts, I would like to point out a continuity error that I intend to exploit in order to extend the length of my story! Now, K-ON! College states three things about OnNaGumi's High School days.
1. Sachi and Ayame met Akira in the Light Music Club in year 2 at the latest.
2. Sachi has only been playing bass for two years.
This would mean that Sachi had been in the Light Music Club for three years, but had only been playing for two, and considering that some musical effort must go into being a member of the Light Music Club, this creates a continuity error. Therefore, I am going to disregard Sachi's statement that she has been playing for two years at the time of K-ON! College.
Thank you for considering my story! Chapter 1 will be up shortly!