Goddess Mari, a dominant and seductive performer, transforms a submissive cross-dresser into a cum-loving sissy in this intense double sissification scene. The eager sissy, dressed in lingerie and stockings, follows Mari's explicit instructions, learning to pleasure himself while begging for her approval. Mari, ever the strict teacher, guides him through various exercises, culminating in a rapturous finale where the sissy eagerly swallows his own cum, transformed into Mari's ultimate cum slut.