This piece is based on the Ranma 1/2 martial gymnastics episode. It's the one where female Ranma and Kodachi Kuno face off. Kodachi is famous for playing unfair during the match (using clubs with spikes, for instance.) The referee says none of the moves are against the rules, much to Akane's chagrin. Kodachi is also known for using bouquets of roses filled with paralyzing gas. I don't recall her ever using it on female Ranma. Anyway, this artwork shows Kodachi using her "special chloroform attack" on Ranma during the match. Ranma must stay awake, or she'll lose!