After Meimi Otonashi is targeted by parasitic worms seeking to extract the power of Misty May, Naoto is reunited with his sister Hikari, who has returned from studying abroad. When the villainous Madam Rococo kidnaps Rika using the same reproductive worms, Hikari reveals that the only way to rescue her is to generate "amore" through an intimate encounter between her and Naoto to empower a new Djibril. As Djibril suffers under Rococo's torment, Naoto and Hikari's union triggers a powerful awakening to fight back.