A Couple of Cuckoos

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 of her engagement.

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.

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.

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.

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.

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.

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.

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.

The Kuroshio currents beckon to me.

Hiro and Nagi go on date at the amusement park. Sachi is not amused.

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

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.

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.

Things aren't quite working out, are they?

Nagi is beginning to question his own feelings, and he has trouble even focusing on midterms.

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.

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.

I want to talk about now.

Sachi is worried about Hiro, so she brings Erika along to follow her and learn about her.

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.

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.

You must have noticed by now.

Erika reveals who it is that she’s been trying to reach through social media.

I want to grow up already!

Nagi discusses with Erika what he learned – or tried to learn – from her father.

It's a secret between you and me.

Having topped his grade in the term exams, Nagi confesses to Hiro once again.

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 Erika by his side.

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.

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, including Hiro, scrambles to help her through it.