
Ep 1 - What If...?
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Arata (16), the 3rd of 7 siblings and oldest son of the Shiunji family, dreams of a different life until...
The Shiunji family with their seven children reside in a mansion within Tokyo’s Setagaya ward. The eldest son, Arata, is tired of being pushed around by his five sisters and daydreams of a life without them. That is, until Arata’s father reveals a shocking truth—Arata isn’t biologically related to his sisters! The siblings’ relationships will be tested as they navigate life in this new light.

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Arata (16), the 3rd of 7 siblings and oldest son of the Shiunji family, dreams of a different life until...

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How will the siblings come to terms with the news?

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The gang heads to an amusement park to celebrate Kotono's birthday!

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After Ouka's confession, Minami and Banri want to find out if anything has changed for Arata.

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Kotono's suspicions continue to grow. Meanwhile, Seiha has a theory and demands to test it out.

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Minami's distractions catch up to her in the lead-up to her inter-highs.

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Where is Minami, and what comes of the tournament finals?

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Minami deals with the aftermath, and Banri needs someone to help her.

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Ouka's gone AWOL, and the gang must figure out what's going on.

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Arata has found Ouka, but what next? And how will the rest of the family respond?

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The kids hit up their dad's summer villa in Karuizawa for a chill holiday, but things heat up for Arata!

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As the family trip draws to a close, the siblings each come to terms with their bonds in their own way.