Well, it could be the combination of elements. The 'castling' might bring in a strategic or game - related aspect. And the 'cozy glow' could add a warm, inviting, and perhaps a bit of a magical or dreamy quality to the fanfic. So the blend of these makes it stand out from other fanfics.
I'm not sure specifically which 'castling cozy glow fanfic' stories are out there. You could try searching on fanfic platforms like Archive of Our Own. They might have stories related to this specific concept.
Glow Bedtime Story might be a brand or a particular series of bedtime stories. Maybe it has some unique features like soft lighting effects if it's in a book format, or gentle background music if it's an audio - visual experience. It aims to create a warm and peaceful atmosphere for a good night's sleep.
Glow 2017 is not based on a true story. It's a work of fiction that was developed for entertainment purposes, drawing inspiration from various sources but not tied to actual happenings.