Just out of Reach (Bleach Polyamory BxB Mpreg LS)

When the Body of Juushirou Ukitake is Found in the Sakura blossom fields he loves so much, all evidence points to Hikaru Yuurei, Lieutenant of the 2nd Division as the culprit. Having his Reiryoku Locked away with a collar made of Sekkiseki stone. Thrown in an isolated cell in the Maggots Nest for Hundreds of years, the rest of the soul Society content to just let him rot and forget about him. Finally, after Aizen is Locked away, Juushirou is brought back to the Soul Society, and is heartbroken when he discovers that the wrong person was locked away for the crime.

When Hikaru is Finally Released, he becomes recluse, only leaving his Home when he has too. Juushirou and a few others make it their mission to help him heal.