Mari-san, a science office worker whose boyfriend is also in the same field (face blurred in video), has been thoroughly trained by me for a long time. She's now so well-conditioned that she can climax from just irrumatio or spanking (※irrumatio and spanking orgasms are available in the review bonus). On this day, she came to be trained in secret from her boyfriend after work. With the intense movements of a tongue dildo, she orgasms so hard her personality breaks...?
