This was such a good game series and then the 3rd in the series had to come and shit all over it.
They did a soft reboot(?) of it under a different name of Ciel Nosurge, basically the same concept, but I remember it not being very good, It was more VN than JRPG.
Absolute god tier OSTs too.

https://varishangout.net/media/68c3b91c-23ec-4908-b790-f8ce4528240e/Ar_tonelico.webp