Family's Secret Original Television Soundtrack
| Published by | ポニーキャニオン |
| Release type | Film Score - Official Release |
| Format | 1 Digital - 35 tracks |
| Release date | April 28, 2015 |
| Duration | 01:02:31 |
| Genres |
| 1 | Secret of Family (Openning Title)LEE Sang-hoon | 00:52 |  |
| 2 | MissingLEE Sang-hoon | 01:16 | |
| 3 | People I knowLEE Sang-hoon | 01:28 | |
| 4 | Dark RemembranceLEE Sang-hoon | 02:10 | |
| 5 | RunLEE Sang-hoon | 01:41 | |
| 6 | Where Is My DaughterLEE Sang-hoon | 02:20 | |
| 7 | Sad PainLEE Sang-hoon | 02:40 | |
| 8 | Waltz of GreedLEE Sang-hoon | 01:15 | |
| 9 | DestinyLEE Sang-hoon | 01:46 | |
| 10 | Hysterie최혜성 | 02:04 | |
| 11 | TroubleJBIE | 02:16 | |
| 12 | InvestigateLEE Sang-hoon | 00:59 | |
| 13 | Delicate SituationJBIE | 01:55 | |
| 14 | Her LifeLEE Sang-hoon | 01:33 | |
| 15 | A Terrible DoubtJBIE | 01:29 | |
| 16 | I Miss My DaughterLEE Sang-hoon | 02:23 | |
| 17 | Run AfterLEE Sang-hoon | 01:08 | |
| 18 | The Missing (End title)LEE Sang-hoon | 01:16 | |
| 19 | Mystery of family (Openning title)LEE Sang-hoon | 01:32 | |
| 20 | Serious ThingLEE Sang-hoon | 01:44 | |
| 21 | SuspectJBIE | 02:19 | |
| 22 | HappynessLEE Sang-hoon | 01:14 | |
| 23 | AttackLEE Sang-hoon | 02:06 | |
| 24 | Forget PainfulnessLEE Sang-hoon | 01:53 | |
| 25 | CryingJBIE | 01:44 | |
| 26 | ThanksJBIE | 02:22 | |
| 27 | Past최혜성 | 02:17 | |
| 28 | Over the PathJBIE | 02:12 | |
| 29 | Bad DreamLEE Sang-hoon | 01:55 | |
| 30 | Sad ResentmentJBIE | 01:33 | |
| 31 | Sick (with 이양화)LEE Sang-hoon | 01:43 | |
| 32 | MemoryLEE Sang-hoon | 02:08 | |
| 33 | Mash (End title)LEE Sang-hoon | 01:16 | |
| 34 | Revenge (End title)LEE Sang-hoon | 00:46 | |
| 35 | Remember (Title Song)남기원 | 03:16 | |
