Lady Versus Lady!!.Upon seeing the score result for an exam, Selnia and Tomomi remark on their days since their first year meeting at Hakureiryō Academy, where they eventually become rivals to see who's the most diligent and growing lady. Meanwhile, the academy's water system goes out-of-order, and the school has to use an indoor natural hot spring for the time being, where the servants and uppers are getting into perversions.