Once again, I found myself in a situation where I had to choose between keeping the main dialogue or using the furigana next to it for the translation: The scene of Orpheus fleeing in the T4 with the Vincent Gram, and with the Geass in both eyes, shows him saying the final goodbye to Lyre: Perhaps it goes without saying that the Oldrin who appeared at the beginning, claiming to have killed Lyre, was none other than Lyre himself using his Geass. Tink was the only one who noticed, due to his cybernetic eye (Geass only works on an individual's organic parts, not on artificial prostheses). While the original kanji says, "Farewell, Masked Knight," the furigana explicitly says, "Adiós, Lyre." In Spanish. Which might make sense given that he is leaving Spain/Area 24, I suppose? In any case, I chose to keep the "Farewell, Masked Knight," since that is also the title of the chapter.
As for the chapter's content: This must be, so far, the one that has made the most references to events from the OZ the Reflection photo story. It makes sense, since it focuses on Orpheus abandoning Lyre's mask in order to recover his memories. In particular, we see his missions fighting the Spanish terrorists; his exhibition match against Gino and Anya in the Tristan and Mordred, respectively (a confrontation that Lyre won); the mission to Mount Mulhacén, where he worked with Leonhardt to form the Gram Air Cavalry; and finally, a confrontation that had already been shown in previous chapters: his fight against Jeremiah, which ended with Jeremiah using his Geass Canceller on Lyre, thereby triggering the partial awakening of his memories, which had been sealed by Toto's Geass. As shown in the chapter, Marrybell was also affected by its effects while shielding Lyre. The following chapters should explain what Geass she was under.
By the way, the idol girl performing that concert is a character who appeared in the Oz the Reflection manga, Elicia Markor. Along with Toto and Eris, the three were the only operators the Grandberry had at the time. However, like Sokkia, she eventually left the organization as Marrybell's methods became increasingly questionable (of all the ways she could have returned, I wasn't expecting her to essentially be kidnapped by Nonette).
I'd say the next chapter is the most important one in this volume (and I hope I can finish it in time).