Egao no Kimi wa Taiyou sa / Kimi no Kawari wa Iya Shinai / What is LOVE? 笑顔の君は太陽さ／君の代わりは居やしない／What is LOVE?
Released January 29, 2014 Editions 8 Tracks 3
Regular edition · Regular A
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |
Regular edition · Regular B
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |
Limited edition · Limited A
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |
Limited edition · Limited B
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |
Limited edition · Limited C
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |
Limited edition · Limited D
| 1 | Egao no Kimi wa Taiyou sa | A-side |
| 2 | Kimi no Kawari wa Iya Shinai | A-side |
| 3 | What is LOVE? | A-side |
| 4 | Egao no Kimi wa Taiyou sa (Instrumental) | |
| 5 | Kimi no Kawari wa Iya Shinai (Instrumental) | |
| 6 | What is LOVE? (Instrumental) |