There's an epilogue for Lisle - not sure what's needed for it tho? Was friendship at max? To get the epilogue, make sure you get the 'unbreakable bond with x' achievement, there's one that should be triggered for Lisle too. Make sure you do all the 'spend time with your intended' actions, and in week 6, keep spending time with him until you get that achievement. That + a good ending for Wellin should be enough, I think? At least it seemed to be enough for me, but I don't know if I accidentally checked some boxes that I wasn't aware of