S01E01 You're going to be my boyfriend.
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...
A Couple of Cuckoos
S01E23: What Should We Do Now?
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.
Overview
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
S01E02 I'm not going to marry you.
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.
S01E03 You aren't going to beat me!!!!
Living together with Erika gives Nagi an opportunity to focus on exam prep, except when they run into trouble.
S01E04 Would you please go out with me...?
Having scored higher than anyone else in his grade, including Hiro, Nagi decides to finally confess to her.
S01E05 Can we do our morning study sessions together...?
Hiro and Nagi begin studying together in the mornings, but unexpected circumstances put a wrench in their relationship.
S01E06 I thought you live by yourself.
Erika joins Nagi’s and Hiro’s morning study sessions to wingman for Nagi, and Hiro wants to come hang out at her place.
S01E07 Is my fate going to change?
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.
S01E08 Are you going to marry him?
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.
S01E09 The Kuroshio currents beckon to me.
Hiro and Nagi go on date at the amusement park. Sachi is not amused.
S01E10 Don't treat me like your kid sister.
Sachi and Nagi go shopping together for a Mother’s Day gift, but they can’t think of anything their mother would appreciate
S01E11 I can't forget that just happened.
Erika and Nagi are stuck in a power outage. Nagi goes to the front door to find an emergency kit, when the unthinkable happens.
S01E12 It's not that I like you, yet.
Nagi tries to redeem himself after embarrassing himself in front of Hiro on their amusement park date.
S01E13 Things aren't quite working out, are they?
Nagi is beginning to question his own feelings, and he has trouble even focusing on midterms.
S01E14 Walls exist to be overcome!!
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.
S01E15 We have to tell her... about our secret!
Erika and Nagi walk around the festival together, and she shocks him with how out-of-touch she is.
S01E16 I want to talk about now.
Sachi is worried about Hiro, so she brings Erika along to follow her and learn about her.
S01E17 Anything could happen right now!
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.
S01E18 Who is that person?
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.
S01E19 You must have noticed by now.
Erika reveals who it is that she’s been trying to reach through social media.
S01E20 I want to grow up already!
Nagi discusses with Erika what he learned – or tried to learn – from her father.
S01E21 It's a secret between you and me.
Having topped his grade in the term exams, Nagi confesses to Hiro once again.
S01E22 I'll Be There With You
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...
S01E23 What Should We Do Now?
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...
S01E24 All That Matters Is That You Two Are Happy
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,...
