Kang Kyung-joon's first son, 17-year-old jeong-an, reveals his majestic math score. KBS 2TV ⁇ The Return of Superman ⁇ 493, which is broadcasted at 8:30 pm on August 29, reveals the daily life of Kang Kyung-joon jeong-an Jung Woo. On this day, Sambuja went on a trip to Jeju Island with jeong-an's best friends. On this day, Kang Kyung-joon asks the friends of the first son, 17-year-old jeong-an, to ask questions about jeong-an's school life. jeong-an's friends say that jeong-an sleeps well at school and surprises his father Kang Kyung-joon. As soon as jeong-an began to panic, another friend revealed jeong-an's math score with a steamed vibe, saying that jeong-an is three points in mathematics, regardless of jeong-an's embarrassed face. jeong-an, who has been inaccurate with his score that is not more accurate than the fact that his math score is open, gives a smile by officially certifying his math score, saying that he is 17 points instead of 3 points. On the other hand, the 5-year-old Jung Woo induces a lust with a resemblance to the 17-year-old jeong-an. Jung Woo is in the arms of his brother jeong-an and challenges him to pick a citrus with his fern hand. jeong-an shows his brother Jung Woo five citrus fruits in the palm of his hand, and gives a surprise number quiz to Jung Woo. Jung Woo calmly wants to count the number of citrus fruits. When jeong-an, who is embarrassed by this, asks for the number again, Jung Woo hurriedly leaves his place and avoids the answer, saying that he is proud of the fraternity of his 12-year-old brother-in-law who resembles his math skills.