{% if page.extra.related_notes %}
<aside class="related-content" aria-labelledby="related-notes-title">
  <h2 id="related-notes-title">関連Notes</h2>
  <ul>
    {% for path in page.extra.related_notes %}
    {% set related = get_page(path=path) %}
    <li><a href="{{ related.permalink }}">{{ related.title }}</a>{% if related.description %}<span>{{ related.description }}</span>{% endif %}</li>
    {% endfor %}
  </ul>
</aside>
{% endif %}