The place with the most improvement is the art work. The art work is much crisper then the prequel one-shot, and the characters facial features are more defined. In some ways though one might not recognize the characters as Ayumu's hair style's changes since the first one-shot. I'd normally wonder why the style change occurred, but I also recollect how Ayumu looked to much like a character I saw another writer design and thus Ayumu's style is actually now the writer's own.
Characterization wise there are still problems. In this one-shot Ayumu and Yuu end up switching roles. Chipper Ayumu ends up with the angst ridden personality and Yuu ends up with a more perky personality. Yuu's attitude change can be explained by Ayumu becoming her friend, but Ayumu's is a bit harder to pin down. Her stalker attitude becomes quite manipulative and she shows a darker side. The way Yuu accepts the truth she finds out as well as the way Ayumu treats her after she rejects Ayumu's confesion.
This one-shot continues the mess from the prequel one-shot and makes it worse.
