Filament is an omnibus volume that includes short stories previously published as Bio Luminescence with two new ones. The one-shot "Kusahibari" was ommitted in this release.

This entry includes only two never collected before into books one-shots:

1. Misaki de Bus wo Orita Hito (She Got Off the Bus At the Peninsula)
2. Meikyuu Neko (Labyrinth Cat)