A few months after the game’s release, and even after the opening single’s release, Universal Music published this variant version of the single, now performed by Atsuko Enomoto (who plays female protagonist “Ainna” from Ex-Thèse). And frankly, I don’t like it.
Granted, the songs are well-composed. However, Ainna’s “I’m a timid voice actress” performance is exactly the sort of thing I don’t like about J-pop. Breathy and quiet, the performance lacks the emotion and power found in the original in-game version of the opening. Fujita also changed up the instrumentation a bit to fit the softer voice.
Unfortunately, the other version of the single isn’t as readily available as this printing from Universal. Purchase it if you want, but I prefer the original versions of these opening and ending themes.