- Released in 1991, 
  . The title track (Invisible Love) From January to April 1992, it set a record of being No. 1 for 14 consecutive weeks,   
    which was overwhelming enough to be listed in the Korean Guinness Book of Records at the time.


- the achievements of an artist
 . From the first to the seventh, he set a milestone of seven consecutive million sellers.
 . With a total cumulative album sales of about 17 million, he set a great record as a solo artist who sold the most
   albums in K-pop history (before BTS appeared).
 . Starting with the first album, he was honored to win the most awards in history (from 1st to 10th albums)
   at the Golden Disc Awards.