Dahlia Academy is on the verge of closure, and Rion-sensei is relieved! ? No, it wasn't even close... Because of her serious and responsible personality, she unexpectedly appeared in a cosplay with her breasts exposed. The school festival is a huge success while the students are confused! Rion-sensei's mind and body are liberated, and her hidden sexual tendencies explode! ! She seduces the students with her plump body cosplay as a lewd slut.