Two female university students, "Yui" and "Sana," arrived at a remote hot spring in the mountains for their graduation trip... However, this trip itself was a trap set by a jealous best friend who had gone mad with envy... Having lost the man she loved to Yui, the jealous Sana brought them to a lodge frequented by perverts... There, Sana sought the cooperation of the men... Plotting to demean Yui... Various acts of humiliation carried out in front of a best friend.
