: Instead of direct manual combat, you would manage "Sync Levels" with a chosen heroine during a mission. If your Braveheart Points with a girl are high, she performs "Sync Strikes" that deal massive damage.
If you are looking for what is already in the game to build upon: Infinite Stratos 2 Love and Purge
: A mini-game where you give heroines massages to increase your bonds and Braveheart Points. : Instead of direct manual combat, you would