Kim Youngbae (Taeyang)- A singer of YG who lives in the same apartment as his childhood love Jung Eunji. He is the main vocalist of Big Bang.

Jung Hyerim (Eunji)- A singer under A Cube Entertainment, Youngbae's childhood love,  She is the main vocalist of A Pink

Park Chorong (Chorong)- Likes taeyang, Leader of Apink

Ailee- In love with Taeyang but he thinks of her as a sister. Best friend of Eunji

Hyori- Taeyangs older sister.

Bobby- Taeyangs younger brother

B.I- Taeyangs younger brother

Mino- Taeyangs younger brother

Jung Sooyoun (Jessica)- Older sister of Eunji

Jung Soojung (Krystal- Younger sister of Eunji

Kwon Jiyong (Gdragon)- Best friend of Taeyang