Lee Gong-ryang is the husband of Nammyeong's older sister, and Lee Jun- min is Lee Gong-ryang's son. Lee Joon-min is Nammyeong's nephew and disciple, and Nammyung had a special affection for him. Nammyung and Lee Gong-ryang had a mission to revitalize their family, but they had one thing in common: they failed the past exam. Lee Jun-min passed the exam at a young age and was highly expected by his family, but was hated by those in power and spent about 10 years as a local official. Afterwards, he returned to the center and held various important government posts. He was in the highest position among the figures of the Nammyeong School at the time, and his age was also the second highest among Nammyeong’s disciples. The writings left by Lee Gong-ryang and Lee Jun-min were all lost during the Japanese invasion of Korea in 1592, so there is nothing left. And, no clue can be found in any records to resolve the question of the relationship between Nammyeong and Lee Jun-min. Whenever there was an incident that could reveal the relationship between Lee Jun-min and Nammyeong, Lee Jun-min was avoided due to a special incident. When Nam-myeong went to Seoul, Lee Jun-min's father passed away, and at the time of Gichuk purge, Lee Jun-min's mother passed away. When Nam-myeong died, there is no record that Lee Jun-min paid condolences because he was serving as a government official in a distant province. Eight incomprehensible incidents between Nammyeong and Lee Joon-min were organized, and the solution to these problems will be a clue to reveal the historical identity of the Nammyeong School.