Here's another one of the K-On pedals by 320design! The Rock On! Yui! is a clone of an original 320design: the Yui Driver pedal. Again, this was part of a limited production pedal made several years ago in Japan that tied in with an anime called K-ON! that was about an all-girl rock band of high schoolers (Yui is the lead guitarist). It features the standard Volume, Tone, and Drive controls but also features a "Tea" control which adds bass and mids back into the signal.