The anime adaptation of Oreco Tachibana’s hit manga, “Firefly Wedding,” has officially begun! We’ve got Satoko Kirigaya (CV: Lynn), a count’s daughter with a ticking clock on her life, and Shinpei Goto (CV: Koki Uchiyama), a lethal assassin who believes she’s his “destined one.” What started as a desperate “fake proposal” to stay alive has spiraled into something much more complex.
In this article, we’re looking back at the first three episodes. Let’s just say, seeing Shinpei animated only confirms one thing: this man is absolutely unhinged! Between the terror, the cuteness, and the heart-pounding tension, our emotions are already doing backflips.
If You Think He’s “Cute,” You’re Already Down the Rabbit Hole
The story takes place during the Meiji era—a fascinating time in Japan when tradition met rapid modernization. Satoko Kirigaya, despite her noble status, suffers from a weak heart. Her only wish is to marry well and bring honor to her beloved father. But those plans go up in smoke when she’s kidnapped and faces a literal blade to her throat. Her Hail Mary play? “Let’s get married.”
Proposing to your own hitman is quite the opening hook. When I first read the manga, I thought, “Oh, okay, so this is a standard ‘overprotective romance’ about a sickly but beautiful lady.” Boy, was I wrong. Shinpei isn’t just “overprotective”—he’s borderline obsessive. Is this devotion, or is it madness?
At first, Shinpei doesn’t take the proposal seriously. But once he commits to the idea of being a “groom,” things get wild. He admits his love is “heavy,” and he means it. You truly never know what he’s going to do next.
The terrifying part? You eventually start finding him cute. There’s a saying in the anime community: the moment you find a dangerous man “cute,” it’s game over. You’re hooked.
One second, he has those cold, lifeless eyes of a professional killer; the next, he’s flashing a bright, innocent smile at Satoko. He oscillates between a remorseless monster and a boy in love with dizzying speed. Koki Uchiyama plays this perfectly—his detached, low-register tone makes Shinpei feel bottomless and unpredictable, yet there’s a lingering streak of childishness in his affection for Satoko. He makes the perfect hook of a character…!
The end of Episode 1, “An Unwanted Repayment,” is a must-watch! The sheer eeriness when he appears before a captive Satoko is chilling. The coldness of a man just doing his “job” vanishes, replaced by a blushing, joyful Shinpei shouting, “Let’s get married!” It’s a total head-trip. Is he scary? Is he adorable? Should I be swooning or running for my life? The show doesn’t give you a second to decide.
Satoko’s Strength and the Shifting Power Dynamics
Satoko, voiced by Lynn, is more than a match for Shinpei’s intensity. Despite her frail health, she navigates dire predicaments with remarkable guts and quick wit—she, too, possesses an incredible kind of strength.
You could somewhat sense it from the way she clashed with her sister, but she has tremendous resolve. Even when kidnapped or faced with the threat of death, she calmly observes the situation and puts her mind to work to survive. She even manages to wrap a blood-stained Shinpei around her finger by wiping his mouth and sealing their “vow.” This girl is no ordinary damsel.
In Episode 2, “Tennyo Island,” we see a fascinating psychological chess match. Shinpei tests her, and Satoko responds by playing the damsel who has only him to rely on. As Koki Uchiyama mentioned in an interview, the “power struggle for dominance” between these two is the heartbeat of the show.
Then there’s the monumental firefly scene. Shinpei wanting to show Satoko the fireflies is genuinely sweet, but then he grabs her hand and makes her touch his chest, saying, “This heart already belongs to Satoko.” He even adds a “I like you” on top of that…! It’s a total heart-stopper. Lynn described this sequence as a “triple strike,” and I couldn’t agree more. You can see Satoko’s resolve softening just a little when Shinpei pouts and pleads with her.
Like the fireflies, Shinpei represents a “world unknown” to Satoko. He is dangerous, and there is no telling what he might do next. Yet he’s also the one expanding the horizons of a girl who thought her life was already over. This contradiction makes their relationship electric.
But just when you think things are getting romantic, Shinpei drops a bombshell: “I want you to become a courtesan.” Excuse me?! He claims it’s the only way to escape the island, and Satoko, being the badass she is, steels herself for the task. We also can’t forget Kotaro, who is determined to bring Satoko back!
Terrifyingly Charming: The Momentum of “Firefly Wedding”
Episode 3, “A Watchful Rat,” gives us a mix of tactical planning as Satoko tries to “conquer” Eishin Nitobe, and some comedic relief with Shinpei hovering nearby.
But the climax—where Shinpei rescues Satoko from Eishin—is pure adrenaline. Hearing him call “Sa~to~ko” from the shadows with that manic grin is straight-out of a horror movie. Watching him ruthlessly slash Eishin because “I have to punish the villain who hurt my wife” is peak Shinpei. And his logic that this is an “opportunity for my beloved to like me even more”? Unhinged. Yet, his violent, single-minded devotion is undeniably captivating.
The first three episodes have been a rollercoaster of romance, suspense, and action. The anime-original visual and sound design really pull you into the world.
The contrast is striking: the vibrant, elegant aesthetics of the era slammed against the raw, visceral violence of the underworld. Bright colors turn to blood-red in an instant. It’s a testament to the production that Oreco Tachibana’s delicate art style and beautiful world-building have been preserved so well in the anime.
As we head into the next arc, the mysteries of the Tennyo Island and the secrets surrounding the kidnapping are only going to get darker. Who can be trusted? Why was Satoko targeted? How far will Shinpei go for her? And most importantly, how will Satoko’s heart change as she spends more time with him?
As a manga reader, I’m dying to see how “that version” of Shinpei and “those specific scenes” will be animated. But one thing is for sure: Shinpei was supposed to be the man Satoko stayed away from, yet both she and the audience are already pulled into his orbit. Shinpei is a truly terrifying—and wonderful—man.
【Article by Mitsue Yoshida】
Extra | Episode 3 “Sense of Security”
“Firefly Wedding” — Series Information
Synopsis
A dark, obsessive love story between a “too-devoted” assassin and a noble lady with a short life expectancy.
In an era where women were treated as family property—
Satoko Kirigaya, a count’s daughter blessed with beauty but cursed with a failing heart, has one dream: to marry into a prestigious family and make her father proud.
However, one night, she is abducted as part of a mysterious conspiracy.
Facing certain death, she encounters the assassin Shinpei Goto and tells a desperate lie:
“Let’s get married. If you stay with me, everything will be yours.”
What follows is the story of Shinpei’s obsessive “destined” love and Satoko’s struggle between her duty and her growing feelings for him—a pure yet forbidden form of love.
Cast
Satoko Kirigaya: Lynn
Shinpei Goto: Koki Uchiyama
Kotaro Ogawa: Kent Ito
Mitsueda: Kenjiro Tsuda
Yukari: Kanon Amane
Jubee Kirigaya: Kazuhiro Yamaji
Rie Kirigaya: Haruhi Nanao
Miwako Kirigaya: Hika Tsukishiro
Eishin Nitobe: Kazuyuki Okitsu
©Oreco Tachibana/Shogakukan/”Firefly Wedding” Production Committee
*Some parts of this text have been translated using machine translation
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