I always entertained the idea of extending SenTrin's epilogue into multi-chapters, since it ends officially in a very non-productive place of hanging, with not much resolution. And I wanted to resolve that. Hence, the three damn 'sequels' which I refuse to call sequels.
"Camera Test" -- continuing eplilogue; unofficial =P, Destiny Islands-based
"Silk-Made Basket" -- side-sequel; Hollow Bastion-based, adventure
"I Want Roses at My Funeral" -- series finale; one-shot, Destiny Islands-based