The most precious moment in the movie is Seung Min returned the Disc Player and the Disc to Seo Yeon at the end of the movie. It signifies that Seung Min has completely TERMINATED what ever lingering feeling and romance he still has with Seo Yeon arising from their 1st love in the University. Seung MIn had put those behind and moved on. The image of Seung Min and his newly married wife flying off in a plane to USA reinforces the above.
By the way if you compare a young beautiful fiancee who faithfully stays with you against a ageing divorcee who only contacted you after a lapse of 15 years and to certain extent betrayed you in the past who will you select. Obvious it is the former. Regards