Not Ready!? SenseiNot Ready Sensei ; Not Ready Sensei! ; NOT READY！？ センセイ

The first extra of volume 2 is the first chapter of Love Equation. ~Not Ready? Sensei~ Murakami Hiroshi makes a living out of drawing yaoi manga, though he claims not to be gay. He has a girlfriend, yet regularly sleeps with another man, and even seduced his assistant. His sex life's a mess... will he ever figure out what... or who he wants? Vol. 1 Ch. 2 (Part 2): Side Story Pgs. 52-91 Vol. 2 Ch. 2: Unbalance Pgs.18-57