Lady Versus Lady!!

Upon seeing the score result for an exam, Selenia and Tomomi remark 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 have to use a indoor natural hot spring for the time being, where the servants and uppers are getting into perversions.