If the main character's HP reaches 0 during battle and you get a Game Over, you can resume from that point by using Herostones or your daily free Continues.
When you use a Continue, the battle resumes under the following conditions:
・Your main character recovers 50% HP
・Your sub characters recover 100% HP
・Enemies except specific powerful ones are defeated.
The number of Continues available varies by stage, and there are some stages where Continues cannot be used.
Free refreshes are reset daily at 05:00 (JST).