It's nothing special to invite a friend to your parents' house, isn't it? Danah actually has her own opinion on this and the day Mino asks Hanbin to come over, the time has come to question if 'friends' is still the right term to describe their relationship. Especially for Hanbin and Mino.  

It begins with a fight and turns out to be so much more, more than Hanbin and Mino can handle. But who said that understanding and loving each other was easy?

Hanbin has a secret: He has known and has been a fan of Mino since his days before YG, and he has a crush on him ever since. Only one person knows about this - his best friend Bobby, of course. But what if a shadow from the past suddenly shows up and endangers the secrecy? What if Mino will find out?

Hanbin sends a video message to Mino. But none of them expected the result of it.

There are things that Mino can't say, so he writes a letter to Hanbin.  

Have you ever wondered what Kim Jiwon alias Bobby has to tell his diary? Well, if you do, it's time to find out.  

When you can only think of one person, people say it's love. Mino knows. Hanbin knows.