This one is incredibly vague both in its description and in its actual content and easily screwed up without a walk through. I got this from discussions at Gamefaqs from folks who could read the wiki for this game that is written in japanese.
1. This is done in Refrain mode only.
2. While courting Excella she gives you a Sigil. DO NOT USE IT!
3. While befriending Jinas he gives you a Sigil. DO NOT USE IT!
4. Get an Excella ending and get a Jinas ending.
5. Head back to Marga. Go to Alfriede and pick "Talk"