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Quartet

かるてっと

Eighteen-year-old Hirosaki Naoya moves in with his little brother and sister after their mother remarries. While their parents are away on their honeymoon, the three siblings begin living with their new stepsister, Yukari, a beautiful young office worker. Eager to form a new family, the four of them strive to build a harmonious household together.

As they adjust to their shared life, Naoya and Yukari find themselves navigating the complexities of their unexpected relationship. The boundaries between sibling affection and romantic feelings begin to blur, challenging their initial hopes for a simple family bond. Their daily interactions and growing closeness force them to confront emotions that could reshape their new family dynamic.

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