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.
01. Who Was Umino-kun's First Love?
Hiro moves in with Nagi, Sachi and Erika. Friction arises, but they're reminded of what happiness might mean.
02. Onii Confessed to You, Didn't He?
Hiro is kidnapped and Nagi immediately sets out to save her.
03. That, but Times a Hundred
Nagi is suddenly hit with the truth about Ai’s real objective.
04. I See You're All Together
Hiro is preparing for a festival that's about to be held at her shrine.
05. It's My Life, Too!
The world now knows the face of singer Mochizuki Ai, who created the song “Arc Fault.”
06. There's No Way I Can Be Normal!!
Nagi and Erika are trapped in a hotel room by her mother, who seems to be playing with them.
07. It's Ours to Build!
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08. No Such Thing as a Meaningless Kiss
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09. The Real Enemy is Sachi-chan!!
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10. I Know, Nagi-kun! Let's Take Pictures for Memory's Sake!
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11. I Found Him Attractive for the First Time
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12. Thank You for Falling in Love with Me
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