"So, do you guys visit Sungyeol's parents as much as you visit us?"

Of course, that should be a question Myungsoo can answer confidently, with a resound 'yes'. Except he can't because he has never visited Sungyeol's childhood house and he doesn't know why. Sungyeol has always been a little secretive about his childhood. But one day, Myungsoo sees an old photo of Sungyeol.