((Spin-off to "My imaginary friend")) Chan's life is wild...well, actually not, but moving from America to Korea, just because your best friend tries to find his disappeared imaginary friend, and also first love, is wild enough for a whole life in Chan's opinion. Especially if this invisible friend seems to indeed be real and they are now living as a happy couple, leaving Chan as the lonely single best friend. However, everything goes even more downhill for him, when he finds out that one of Sehyoon's best friends is his first crush from university called Jun who still thinks he is a weird stalker. Okay, he had also called him cute but that didn't really save his reputation...right?
10 parts