Koori no Mamono no Monogatari Gaiden

A demon named Blood, imprisoned in ice for decades, seeks the "tear jewel" to lift his curse. A dying boy named Ishuca visits the cave and, moved by his kindness, Blood grows attached. After Ishuca dies, Blood weeps, creating the jewel that revives him. They travel together, and Blood reconnects with former allies who now oppose him due to his refusal to return to his violent past. Blood confesses his history and vows not to kill humans. Their journey continues as they head to Toei Cliffs to find a jewel requested by a dealer named Wild.