The OST I found on youtube only contains two of the songs. I've put the main language its sung in as well, to help you identify a particular song.

OST:

• 星願 -  董唧唧, 榮耀
• 我承认不够爱你 -  董唧唧

Here are the others according to the credits:

• Sunset Bossa Nova - Juju B. Goode (Korean)
• Give You My Heart - BASHAM (English)
•  Never Be Lonely - Frankie Orella (English)
• Superwoman - Juju B. Goode (Korean)
• Because of you - Msick,  Le'mon (Korean)
• TRAUMA - ZOEE, MIRMANGDI, RGBY (Korean)
• Feelin' You - 지슈 Shu (Korean)
• A Starry Night - 지슈 Shu Feat.Yimgah (Korean)
• Hi Fine Shyt - 张天枢 (English)

But I can't identify the intro song :/ does anyone know it?