koi_wa_sekai_seifuku_no_ato_de
Known in English as Love After World Domination. A manga series written by Noda Hiroshi, and illustrated by Wakamatsu Takahiro.
Follows the story of Magahara Desumi, the leader of the villainous Gekko who sought world domination. Being in love with the heroic Gelato 5 leader, Aikawa Fudou, her supposedly archrival, both Aikawa and Magahara must date in secrecy while the public perceive them as mortal enemies.