"If nobody notices that you are a girl until we graduate, I will give you a billion won."

"I'm in."

The bet was on. Will Shiru be able to hide her identity until she graduates?!

Formerly hosted on Foxtoon, but can no longer be found on that site.

Most sources for the series list 77 chapters, however, there are in fact 85 chapters total. Unfortunately, this includes the official English translation.