In the year 202X, Earth has fallen under the evil aura of the demonic world tree Yggdrasil, plunging the planet into chaos and ruin. Sailor Selene / Hoshino Urara fights alongside her comrades, the Sailor Knights, but her lover, Exceed Mask, is captured by the enemy and her allies fall one by one. Selene storms Yggdrasil, the enemy's stronghold, confronting her archenemy Necrodia—only for Exceed Mask, now fallen into darkness as Durandal, to appear before her. Forced to hand over the Lumines Gem that powers her abilities, she is humiliated and degraded on Necrodia's orders, and coerced into a non-consensual first sexual experience with Exceed Mask. Yet, reclaiming her newfound strength, Selene defeats Necrodia and purifies Exceed Mask. Immediately afterward, as Selene advances toward the enemy's core, a tentacle-like organ emerges before her, restraining her body and implanting its seed within her. An endless cycle of perpetual reproduction then begins...! [BAD END]