Mutual Kill: The mures kill Youko in chapter 14 by creating a human-type kaiju out of her own Doppelgänger—meaning it could kill her simply by committing suicide. They end up running each other through.

Ecchi: The series is quite frank and undeniably fanservicey about female sexuality, with a number of Shower Scenes, a couple of softcore masturbation scenes involving Kitamura, and eventually softcore girl-on-girl sex scenes. Somewhat oddly given the extent of the sexual content, Seven Seas rated it "Older Teen (17+)", rather than grouping it as "Mature" and printing it under their Ghost Ship imprint. Adaptation Expansion: Semelparous is loosely based on an earlier oneshot by the same mangaka, "Tagai no Guardian". Human Aliens: The mures, a race that once lived in the Void Between the Worlds until a Civil War led to them conquering the other world, with their dissidents fleeing to ours and creating the Bulwarks to keep the others out. Mures are externally indistinguishable from humans but can pass through the walls between the worlds. Teacher/Student Romance: As a rookie Bulwark, Yorino is partnered to Unit 3 captain Youko for seasoning. The two women fall hard for each other and become a terrifyingly effective Battle Couple. Semelparous ( セメルパルス) is a Dark Fantasy Yuri Genre manga series by Jun Ogino (creator of Gamma). The series is an expanded rework of Ogino's 2016 one-shot " Tagai No Guardian" and began serialization in Comic Yuri Hime on 18 November 2019. An English localization by Seven Seas Entertainment was published beginning 14 December 2021.Masturbation Means Sexual Frustration: Kitamura has a serious crush on Yorino and is shown masturbating to a fantasy of her in a couple of chapters. She has approximately zero chance of being able to consummate her crush given the Teacher/Student Romance between Yorino and Youko. Foreign Language Title: The Japanese title of the series is just the word "semelparous" in katakana. It's a biological term describing species that only reproduce once in their lives (salmon for example). Homosexual Reproduction: Mures are able to conceive with human-mure Uneven Hybrid Bulwarks by taking the Bulwark's Aegis into themselves. In the case of Yorino's parents, both partners were female. After learning this, Yorino mentions the possibility that she might get pregnant with her girlfriend Youko while having sex with her. Left alone, Yorino continues her training and graduates at the top of her class and is assigned to Unit 3 Captain Kaminoi Youko for field training. As they slay the kaiju together, Yorino must face up to both the horror of the Forever War and her burgeoning feelings for her mentor.

Sole Survivor: The Bulwarks are descended from humans and a faction of mures that, in roughly the mid-19th century, lost a war against another faction that turned Multiversal Conqueror and fled from the Void Between the Worlds into our universe. Unbeknownst even to herself at the start of the series, Yorino is the last pureblooded mure on "our" side after her birth mother was killed in action when she was four. Never the Selves Shall Meet: The Alternate Universe has all the same people as the prime universe, but normally the walls between the worlds keep the death of one from affecting the other. However, if they die in the Void Between the Worlds, so does their counterpart: it takes two walls to fully isolate the counterparts from each other—and the kaiju are made from humans, meaning every time the Bulwarks kill a kaiju, somebody in our world dies. The mures of the other world weaponize this, making kaiju out of the doubles of friends and family of the Bulwarks to psychologically torture them, and, when possible, the Bulwarks themselves, to ensure a kill.

Interest Stacks

Good Thing You Can Heal: Pureblood mures are able to heal from grievous wounds by drawing energy from the walls. Sexually Transmitted Superpowers: Inverted. Yorino's birth mother Mikoto, a pureblood mure, conceived her by taking her lover Maya's Aegis into herself. This caused Maya's powers as a Bulwark to weaken and eventually disappear by the time Yorino turned four.