After the sparkling K-pop concert, 2AM goes down from the stage with sweat on their faces. Jo Kwon's attention is no longer on his way. He seems to consume his entire energy to lift his head up.     An exhausted girl in short shorts appears right in front of him. Ya, Kwon is not dreaming, the girl is GaIn-- his 'ex-wife'. their expression is the same, astonished, confused. The other members in 2AM are shocked, too. They come back to their sense and start teasing Kwon, because of the unusual experience between those two.  Finally, Seulong and his buds leave them alone. Then, smile cracks on their face.     Jo Kwon turns out to be cheerful and excited. He is unable to talk for a long time. But nobody is embarrassed by the silence. They are actually enjoying it.    'hey! Long time no see!' GaIn breaks the silence.   'hi! This is...unbelievable.' He giggles in disbelief.   These two old pals are parted for such a long time. They are not that close to each other any more, only friends. Their relationship has altered while time was flowing away.   Although Jo Kwon impresses others by his hilarious behavior, there is also a sensitive side. He knows immediately that they are not that adorable combination--Adam couple, who have gained lots of attention, by GaIn's inperfect smile.    'I have to help her to get back that sweet and perfect smile again.' Kwonnie makes a promise secretly.    'We should hang out. I missed you.' Kwon says playfully.   GaIn's mouth split open, obviously her answer is YES.    Will this unexpected encounter open up a brand new love adventure?