The father doesn't know where he found her, but he brings home a woman with tattoos who doesn't look like a tutor at all! However, contrary to appearances, she teaches her son well, but her son's stupidity is beyond imagination. Feeling that his income as a tutor is in danger, the teacher changes the study menu to take advantage of the son's perverted Kokoro! He writes the names of body parts in kanji and makes him memorize how to read them, and when he reads "sex orgy" and "oral sex," he tries them out... Will the son be awakened by the naughty lessons taught by the unconventional teacher?