Few words about the ending concept.
This is about death or rather the aftermath in hbr when the "self" slowly fade away. So the first half with vocals has those sharp angle downbeat sliders, slightly curved normal sliders, stacked double kicks and few higher spacing. Non kiai part use lower density and more breaks to give more impact when the next kiai kicks in but once it enter second part where the character forgot language and can only only remember the melody, downbeat sliders are now curved, all normal sliders are straights, no double kick stack only this lukewarm even spacing everywhere to follow the piano and on non kiai, stacks are there to lower aim and same lower density and breaks.
meta: https://vgmdb.net/album/124453, also on first disk of ost vol1. release https://vgmdb.net/album/123829
metadata:
add the following text to your tags:
jpop j-pop pop rpg gacha visual arts visualarts
and perhaps add a few of the characters names from the game to the tags as well