This ost is incredible melody-wise, as your works usually are.
Forgetting a world - such a rich and complicated melody hiding behind a radio frequency filter. I imagine it being representative of gradually forgetting something so bright, something that seemed unforgettable back then. And the last note just hanging on and descending in tone slightly is a perfect ending to that representation - you can't remember the rest of that wonderful melody anymore.
Orbit - has some desolate cosmic vibe to it due to reverberation, and again, a complex and beautiful melody, but this time more wide, unfiltered, like it's not the past anymore, but the present. Yet it's still melancholic, in a way that you're... Bored? Like, you're orbiting a planet while something is happening on it, but you're not a part of it.
Castle Chaser - got to listen to it before the jam, gives off hk vibes. And overall it's obviously tense, but not too tense, even a bit light-hearted, I imagine this being like "finally something interesting's happening!" type stuff. And HOLY TRIPLETS ON THE PIANO!!!!
Finaly - Finaly. The buildup towards the drop is just majestic, and the drop is POWERFUL. The guitar could have a bit more mixing tho, but I know this one was very rushed. And I won't stop saying this, the melody is SO GOOD GOD DAMN
Overall - what peak is blessing my ears holy crap. Might be one of the most melodic submissions I've heard yet, since the most of them focused more on sound design. And the story is, well, almost absent, but the idea itself is very cool. You cooked as always bro :3