"ENDLESS CIRCULATION" is the DLC for EZ2ON REBOOT : R.
This DLC includes the following content:

Songs

▣ 1. A Site De La Rue | by STREME REVERIE
▣ 2. A Glimmer | by Rammage
▣ 3. actias artemis | by iMp
▣ 4. Airwave | by Kari
▣ 5. BEATRICE | by RMHN
▣ 6. Black tinted alley | by croaktica
▣ 7. Dream Walker | by HiRO
▣ 8. Dancing Light | by ATAS
▣ 9. DISTOPIA | by wigen
▣ 10. Entire | by KIEN
▣ 11. Nothing Else | by KIEN
▣ 12. Shine Through | by STREME REVERIE
▣ 13. Starlight Factory | by ATAS
▣ 14. Stranger | by LhoU
▣ 15. Tension | by Springhead
▣ 16. TRON | by Rammage
▣ 17. Todos Los Dias | by HiRO
▣ 18. Withered Heights | by KIEN
▣ 19. Awakening Universe | by Memme
▣ 20. Chaotic Neutral | by aran
▣ 21. Again | by Springhead
▣ 22. Fallback | by Paraphrase
▣ 23. FUTURE NIGHT | by sun3
▣ 24. Total Eclipse | by ATAS vs. KANETA
▣ 25. True | by Kari
▣ 26. Planet X | by HiRO
▣ 27. UniT | by PDN
▣ 28. Legend | by Lunatic Sounds
▣ 29. The White Horizon | by LhoU
▣ 30. Push me again | by Diesel Eater
▣ 31. Orphan Children | by Mr.Kei
▣ 32. Rendezvous Coast | by wigen
▣ 33. WHEEL OF FIRE | by RAVEN@TION
▣ 34. Magic Square | by fromsmk
▣ 35. Break of Dawn | by KIEN
▣ 36. northpole | by iMp
▣ 37. INSTANT Vampire†StartKit™ | by Dr.ReB
▣ 38. Shove it (yusi. Remix) | by yusi.
▣ 39. Wings on my Back | by TAG

Skins

"ENDLESS CIRCULATION" exclusive system theme, panel skin, and note skin.