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.
Episode 1
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.
Episode 2
I'm not going to marry you.
May 1, 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.
Episode 3
You aren't going to beat me!!!!
May 8, 2022
Living together with Erika gives Nagi an opportunity to focus on exam prep, except when they run into trouble.
Episode 4
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.
Episode 5
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.
Episode 6
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.
Episode 7
Is my fate going to change?
Jun 5, 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.
Episode 8
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.
Episode 9
The Kuroshio currents beckon to me.
Jun 19, 2022
Hiro and Nagi go on date at the amusement park. Sachi is not amused.
Episode 10
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
Episode 11
I can't forget that just happened.
Jul 3, 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.
Episode 12
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.
Episode 13
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.
Episode 14
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.
Episode 15
We have to tell her... about our secret!
Aug 7, 2022
Erika and Nagi walk around the festival together, and she shocks him with how out-of-touch she is.
Episode 16
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.
Episode 17
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.
Episode 18
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.
Episode 19
You must have noticed by now.
Sep 4, 2022
Erika reveals who it is that she’s been trying to reach through social media.
Episode 20
I want to grow up already!
Sep 11, 2022
Nagi discusses with Erika what he learned – or tried to learn – from her father.
Episode 21
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.
Episode 22
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.
Episode 23
What Should We Do Now?
Oct 2, 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.
Episode 24
All That Matters Is That You Two Are Happy
Oct 2, 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.