Kim Nara was always there for him. She was there when he had tough times during his Trainee Period. She was there when he had problems as an Idol. 

She was always there.

Baekhyun knew it also. He loved Nara with all his heart. He loved her so much but his playboy side never faded, even when he had Nara by his side. He knew she was there for him. He knew she loved him and he also knew she was always there for him. But did he take her for granted? 

Will she always be there for him?

Then there's Kyungsoo. Who was always right there for Nara.