The way the main characters create a bond with each other is kinda out of the blue  because they didn't even know each other, the way it happen was kinda off to me!
The development of this drama was fine although I hate it when a character is "in love with 2 people" because for me that doesn't make sense, you may like them and the way they treat you but if you are thinking in who to choose that's not love! But actually in this case we can see that the main character is in love with just one of them and is just afraid of leaving the other one alone, because he confuses the feeling of being cared of, with love. And that confusion makes them betray their partners.
I recommend this drama for the kisses and the background in each couple and the way they change for love.