All events for main characters are explained step by step in the walkthrough.
Did you perhaps miss the part about the woman in the bottom area of the dungeon where you find Vampire?
Events for Vampire:
1. Talk with Vampire at the sleeping chamber with Ryen's level at 10+ to start the quest "Friendly Turn".
2. Go to the army camp in Amagal and follow the path on the right side to get the dialog that a volcano is over there. This will unlock Vampire's dialog for the quest "Into The Fire".
3. Talk with Vampire with 40+ relationship and the secret room behind your bedroom known to Ryen. (Nude CG)
4. The next step requires 70+ relationship and that the events with Mira are advanced to step no. 3 (oral scene). Dual Blowjob CG with Mira.
5. Check the Aldlyn city board to see a note about hunting a Vampire and finish the quest. Rewards you with the footjob CG scene when you talk with Vampire again at the sleeping chamber after the quest is done.
6. Once you're far enough in the main story to enter Dorgania, and talked with the woman in the nature area at the bottom of the north dungeon, a new dialog at the sleeping chamber will start the "Vampire's Past" quest.
7. The maid Louise is now two tiles right from Vampire at the sleeping chambers. Talk with her to start the CG scene with Vampire in maid uniform. (Maid and teasing Cgs).
8. Talk with Vampire again with 100+ relationship for the "Library Exploration" quest. After the quest you can talk with Vampire once more for her first sex scene.
9. After the fight against Raziel in the main story, the Windspirit will appear in the top left corner of Aldlyn and trigger the next events of Vampire. (Sex with whip CG).
Bonus Scene: In the bathhouse if you have 60+ relationship and the nude scene done.
