released on April 13, 2016.
| 74 oku fun no kimi he (Type A) [CD+DVD] Catalog: UPCH-80428 | 1. | 74 okubun no 1 no Kimi-e (74億分の1の君へ) | 4:04 | 2. | Chain Of Love | 4:12 | 3. | Taboo no Iro (タブーの色) | 4:43 | 4. | 74 okubun no 1 no Kimi-e (Instrumental) (74億分の1の君へ [instrumental]) | 4:05 | 5. | Chain Of Love (Instrumental) (Chain Of Love [instrumental]) | 4:12 | 6. | Taboo no Iro (Instrumental) (タブーの色 [instrumental]) | 4:45 |
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| 74 oku fun no kimi he (Type B) [CD+DVD] Catalog: UPCH-80429 | 1. | 74 okubun no 1 no Kimi-e (74億分の1の君へ) | 4:04 | 2. | Chain Of Love | 4:12 | 3. | HKTjo, Ima, Ugoku (Hkt城、今、動く) | 4:47 | 4. | 74 okubun no 1 no Kimi-e (Instrumental) (74億分の1の君へ [instrumental]) | 4:05 | 5. | Chain Of Love (Instrumental) (Chain Of Love [instrumental]) | 4:12 | 6. | HKTjo, Ima, Ugoku (Instrumental) (Hkt城、今、動く [instrumental]) | 4:47 |
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| 74 oku fun no kimi he (Type C) [CD+DVD] Catalog: UPCH-80430 | 1. | 74 okubun no 1 no Kimi-e (74億分の1の君へ) | 4:04 | 2. | Chain Of Love | 4:12 | 3. | Einstein Yori Diana Agron (アインシュタインよりディアナ・アグロン) | 4:32 | 4. | 74 okubun no 1 no Kimi-e (Instrumental) (74億分の1の君へ [instrumental]) | 4:05 | 5. | Chain Of Love (Instrumental) (Chain Of Love [instrumental]) | 4:12 | 6. | Einstein Yori Diana Agron (Instrumental) (アインシュタインよりディアナ・アグロン [instrumental]) | |
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