Storyline
16-year-old super-studier Nagi Umino, second-year student at the Megurogawa Academy high school, was switched at birth. On his way to a dinner to meet his birth parents, he accidentally meets the brash, outspoken, Erika Amano, who is determined to make Nagi her fake boyfriend as she never wants to actually marry. But once Nagi makes it to dinner, he finds his parents have decided to resolve the hospital switch by conveniently having him marry the daughter his birth parents raised...who turns out to be none other than Erika herself!
Episodes
Specials
No overview available for this season.
Cuckoos' Drama #1: Reincarnation in Another World
Apr 28, 2022
World-Changing Angel!
Cuckoos' Drama #2: Another World's Skill
May 06, 2022
I love the world!
Cuckoos' Drama #3: Other World Is the Best
May 13, 2022
The world is the best!
Cuckoos' Drama #4: Other World's People
May 20, 2022
World War II!
Cuckoos' Drama #5: Other World's Food
May 27, 2022
Another world food!
Cuckoos' Drama #6: Other World's Comrade
Jun 03, 2022
Friends from another world!
Cuckoos' Drama #7: King of the Other World
Jun 10, 2022
World King!
Cuckoos' Drama #8: Guild of the Other World
Jun 17, 2022
World Guild!
Cuckoos' Drama #9: Another World's Equipment!
Jun 24, 2022
World Equipment!
Cuckoos' Drama #10: Another World's Battle!
Jul 01, 2022
World Battle!
Cuckoos' Drama #11: Another World's Bar!
Jul 08, 2022
The world thrives!
Cuckoos' Drama #12: Continue! Another World's Bar!
Jul 22, 2022
Tribe! World War II!
Cuckoos' Drama #13: Another World's Inn!
Jul 29, 2022
Another World Home!
Cuckoos' Drama #14: Another World's Morning!
Aug 05, 2022
Another World Morning!
Cuckoos' Drama #15: Another World's Date!
Aug 12, 2022
World Day!
Cuckoos' Drama #16: Another World's Succubus!
Aug 19, 2022
Another World Success!
Cuckoos' Drama #17: Another World's Hero!
Aug 26, 2022
World Hero!
Cuckoos' Drama #18: Another World's Magic!
Sep 02, 2022
World Magic!
Cuckoos' Drama #19: Another World's Dungeon!
Sep 09, 2022
World Adventure!
Cuckoos' Drama #20: The Villainess!
Sep 16, 2022
Poisonous Cure!
Cuckoos' Drama #21: A Flag of Destruction!
Sep 23, 2022
Flag of Destruction!
Cuckoos' Drama #22: Goodbye Another World!
Sep 30, 2022
Goodbye Other World!
Season 1
Nagi Umino and Erika Amano, a studious high school student and a social media star, had nothing that linked them together—until they found out they were swapped at birth. When the sudden news is revealed to both of their families, their parents quickly devise a proposition with neither Nagi's nor Erika's knowledge: in order to restore them both to their rightful families and ensure everyone's happiness, the two should get engaged. When informed of this, Nagi and Erika are quick to reject the absurd plan, refusing to go along with their parents' wishes. But, with neither party willing to back down, only time can tell where their relationship will go.
You're going to be my boyfriend.
Apr 24, 2022
Umino Nagi was swapped with another child at birth. He’s going to meet his real parents today, but on his way to school, he meets a girl who is threatening to die to get out of her engagement.
I'm not going to marry you.
May 01, 2022
Nagi and Erika are now engaged, but Nagi can’t wrap his head around how loaded Erika is, and Erika seems to have concerns of her own.
You aren't going to beat me!!!!
May 08, 2022
Living together with Erika gives Nagi an opportunity to focus on exam prep, except when they run into trouble.
Would you please go out with me...?
May 15, 2022
Having scored higher than anyone else in his grade, including Hiro, Nagi decides to finally confess to her.
Can we do our morning study sessions together...?
May 22, 2022
Hiro and Nagi begin studying together in the mornings, but unexpected circumstances put a wrench in their relationship.
I thought you live by yourself.
May 29, 2022
Erika joins Nagi’s and Hiro’s morning study sessions to wingman for Nagi, and Hiro wants to come hang out at her place.
Is my fate going to change?
Jun 05, 2022
Nagi invites Hiro to join his group for a school field trip. The group is plunged into chaos with the addition of a couple more members.
Are you going to marry him?
Jun 12, 2022
Sachi notices something going on between Erika and Nagi and decides to try to get to the bottom of it. Both she and Nagi are on the verge of a big decision.
The Kuroshio currents beckon to me.
Jun 19, 2022
Hiro and Nagi go on date at the amusement park. Sachi is not amused.
Don't treat me like your kid sister.
Jun 26, 2022
Sachi and Nagi go shopping together for a Mother’s Day gift, but they can’t think of anything their mother would appreciate
I can't forget that just happened.
Jul 03, 2022
Erika and Nagi are stuck in a power outage. Nagi goes to the front door to find an emergency kit, when the unthinkable happens.
It's not that I like you, yet.
Jul 10, 2022
Nagi tries to redeem himself after embarrassing himself in front of Hiro on their amusement park date.
Things aren't quite working out, are they?
Jul 24, 2022
Nagi is beginning to question his own feelings, and he has trouble even focusing on midterms.
Walls exist to be overcome!!
Jul 31, 2022
Erika’s parents want her to come home if she fails her make-up exams. She asks Nagi for help, but it may not be that easy.
We have to tell her... about our secret!
Aug 07, 2022
Erika and Nagi walk around the festival together, and she shocks him with how out-of-touch she is.
I want to talk about now.
Aug 14, 2022
Sachi is worried about Hiro, so she brings Erika along to follow her and learn about her.
Anything could happen right now!
Aug 21, 2022
Erika, Hiro, Sachi and Nagi make plans to study at Erika’s vacation house, but there ends up being a slight change in the roster.
Who is that person?
Aug 28, 2022
Nagi is hoping to do the test of courage with Hiro, but Erika takes him instead. Nagi can’t figure out what it is that’s bothering her.
You must have noticed by now.
Sep 04, 2022
Erika reveals who it is that she’s been trying to reach through social media.
I want to grow up already!
Sep 11, 2022
Nagi discusses with Erika what he learned – or tried to learn – from her father.
It's a secret between you and me.
Sep 18, 2022
Having topped his grade in the term exams, Nagi confesses to Hiro once again.
I'll Be There With You
Sep 25, 2022
Erika, Hiro, Sachi, and Nagi spend more time at the beach home retreat, and eventually, clues about Erika's missing older brother are found. This incites Nagi to search for him around the nearby town with Erika by his side.
What Should We Do Now?
Oct 02, 2022
On the day Nagi, Erika, Sachi, and Hiro are to return home, Nagi and Hiro decide to stay behind to collect a shrine stamp from the local temple. However, become of this, their train ride home is canceled due to the stormy weather, thus forcing them to stay at a local inn where things get strangely intimate.
All That Matters Is That You Two Are Happy
Oct 02, 2022
The household visits the diner to attend Yohei's birthday party and learn some family secrets surrounding them. The next day after a study session, Erika succumbs to a cold that she caught, and the household, including Hiro, scrambles to help her through it.
Season 2
A lot has happened for Nagi Umino and Erika Amano: they were swapped at birth, learned of their engagement, and have started living under the same roof. The two now share their home with Nagi's sister, Sachi, and his crush, Hiro Segawa. Despite this unusual domestic situation and frequent quarreling, the group is beginning to settle into a life together. However, the return of Nagi's childhood friend Ai Mochizuki to Japan complicates things. Ai suddenly declares her intention to marry Nagi, and although he turns her down, she is committed to having him all to herself. Now with four girls around, each with their own thoughts about him, Nagi must figure out his own feelings and the best way forward.
Who Was Umino-kun's First Love?
Jul 08, 2025
Hiro moves in with Nagi, Sachi and Erika. Friction arises, but they're reminded of what happiness might mean.
Onii Confessed to You, Didn't He?
Jul 15, 2025
Hiro is kidnapped and Nagi immediately sets out to save her.
That, but Times a Hundred
Jul 22, 2025
Nagi is suddenly hit with the truth about Ai’s real objective.
I See You're All Together
Jul 29, 2025
Hiro is preparing for a festival that's about to be held at her shrine.
It's My Life, Too!
Aug 05, 2025
The world now knows the face of singer Mochizuki Ai, who created the song “Arc Fault.”
There's No Way I Can Be Normal!!
Aug 12, 2025
Nagi and Erika are trapped in a hotel room by her mother, who seems to be playing with them.
It's Ours to Build!
Aug 19, 2025
No Such Thing as a Meaningless Kiss
Aug 26, 2025
The Real Enemy is Sachi-chan!!
Sep 02, 2025
I Know, Nagi-kun! Let's Take Pictures for Memory's Sake!
Sep 09, 2025
I Found Him Attractive for the First Time
Sep 16, 2025
Thank You for Falling in Love with Me
Sep 23, 2025
Series Info
Status
Ended
Seasons
2
Episodes
36
Language
ja
Networks
