HEART Events are special events where Luchs can bond with one of the maidens. Each one has a separate story centered around a maiden and includes battles. At certain points in the main story, a pink heart will appear above several maidens to indicate a HEART Event is available. You can only pick one at a time, but you can see other events on a subsequent playthrough. Once completed, the maiden will learn a new skill.
Luchs's room will change as more HEART Events are completed. Each event adds an item to the right side of the room. The top shelf on the bottom wall are from the first set of events. The miscellaneous items near the window and on the couch are from the second set. The pictures on the board are from the third set. Frieda's second HEART Event adds a jukebox where the background music can be changed. The music reverts once you leave the room.
| I | II | III | |
|---|---|---|---|
| Charlotte | Chapter 4 | Chapter 6 | Chapter 8 |
| Beatrix | Chapter 4 | Chapter 6 | Chapter 8 |
| Elfriede | Chapter 7 | Chapter 8 | Chapter 9 |
| Gabriele | Chapter 7 | Chapter 8 | Chapter 9 |
| Diana | Chapter 9 | Chapter 12 | Final Chapter |
| Francesca | Chapter 9 | Chapter 12 | Final Chapter |
| Adelheid | Chapter 9 | Chapter 12 | Final Chapter |