Eyes of Light and Darkness

AU (or really UA). Issei Hyodo is shy, has no friends, and lives with his only remaining relative, his grandfather on his mom's side. One day, he gets home and is notified that his grandpa is at the hospital, and rushes there to see him. This is a fic with all the world-building of the canon, but with little following of the plot points. Polyamorous, Bisexual, Angsty Issei.