Tokonome Mamori is transferred to Mermaid - an artificial quarantine island for people with superpowers. When Mamori is attacked, a newly transferred girl named Mirei saves her. The enemy doesn't stop, however, and the two are soon cornered. Just when they think all hope is lost, Mirei kisses Mamori, and Mamori turns into a sword. Mirei then wields the sword and launches a counterattack against their enemies.
Valkyrie Drive: Mermaid (Season 0)
Please, Teach Me (Episode 1)
Air date: 2015-12-18
Runtime: 2 min
Overview: In order to unlock higher powers as an Arm, Mirei asks Mamori to try different things to bring her pleasure.
Can't Do It Alone (Episode 2)
Air date: 2016-01-27
Runtime: 2 min
Overview: During a soak in the bath, Charlotte thinks about who she will use in her next sexual misdeeds, looking back on her past conquests of other women.
Lonely and Unable to Sleep (Episode 3)
Air date: 2016-02-24
Runtime: 2 min
Overview: Having just left the shower, Kasumi lies on her bed, half naked, looking back fondly on her time with Hibiki and their lovemaking.
The Actress in the Mirror (Episode 4)
Air date: 2016-03-23
Runtime: 2 min
Overview: Contemplating how she is forced to disguise herself, Akira stands naked, wishing she could be back in the arms of her lover as she tapes her breasts down and assumes the mantle of Governor, wearing a uniform that makes her appear as a man.
Believe in Me, Believe in You (Episode 5) 10.0
Air date: 2016-04-27
Runtime: 2 min
Overview: While they have sex, Lady J notices that Rain is more lively and motivated than usual, and after having sex, she finds out that it's because Rain saw how two of her peers, Mirei and Mamori, were close together.
Lonely Chaser (Episode 6)
Air date: 2016-05-25
Runtime: 2 min
Overview: While looking up a picture of Mirei, Momoka begins to relive old memories of how they had sex together, and muses on the concept of her being able to fondle her in the same way she did before, and later destroy her.
Seasons
Episodes 12
Episodes 6