Board Thread:Special Events/@comment-25730832-20151117074836/@comment-3131745-20151122213405

31.205.255.162 wrote: Quick question, do I need to achieve S rank for last dance? Or just killing SS hime enough to clear map?

AFAIK, E4 is a regular combined fleet map, so killing the buttplugged psycho should be enough to reduce the gauge/clear the map.

If you want Graf, Yuu or other specific drop, S-rank may be required.