The story of The Shiunji Family Children begins in the Shiunji family mansion, where seven siblings--five girls and two boys--live together in apparent harmony. The eldest brother, Arata, is the heir to the family, and the siblings share a close, down-to-earth relationship despite their high social status. Their daily life is filled with typical sibling interactions, teasing, and lighthearted moments, all under the watchful eyes of society, which envies their beauty and closeness.

On the fifteenth birthday of the youngest sister, Kotono, the family gathers for a special occasion. Their father, honoring a promise made to their late mother, decides it is time to reveal a long-kept secret: except for two of the sisters, none of the siblings are actually blood-related. They are all adopted. This revelation shocks the family, but after the initial surprise, they collectively decide that their bond as a family is not defined by blood but by the years they have spent growing up together. This decision sets the stage for the complex emotional and romantic developments that follow.

Following the revelation, the siblings must navigate their relationships with this new understanding. Kotono, who has already confessed her love to Arata, faces particular emotional turmoil, as the knowledge that they are not blood-related complicates her feelings and the family dynamics. The siblings grapple with their identities and the boundaries of their relationships, leading to moments of tension and introspection.

Meanwhile, Minami, one of the sisters and a talented tennis player, faces her own challenges. During the inter-high school tennis finals, Minami suffers an injury that threatens to end her participation. She disappears from the tournament, causing concern among her siblings. It is later revealed that Minami's absence is not just due to physical injury but also because of deeper emotional struggles and insecurities she has been hiding. The siblings rally to support her, encouraging her to confront her fears and return to the competition. This sequence involves heartfelt conversations and moments of vulnerability, culminating in Minami overcoming her doubts and rejoining the finals.

Throughout the series, each sibling deals with personal arcs tied to the family's secret. The eldest sister learns to rely on others rather than bearing burdens alone. Another sister confronts feelings of loneliness and betrayal upon learning she was lied to about her origins. These individual stories unfold alongside the central family drama, deepening the emotional texture of the narrative.

The series also explores the romantic complications that arise from the siblings' non-blood-related status. As they come to terms with their true relationships, some siblings begin to entertain romantic feelings for each other, which they had previously suppressed or considered taboo. These developments lead to moments of tension, confession, and emotional conflict, driving the story forward.

The final episodes focus on the siblings' acceptance of their complex family structure and their decisions about how to move forward. They reaffirm their commitment to each other as family, regardless of biology, and begin to explore the new possibilities in their relationships. The series ends with the siblings united, having faced their individual and collective challenges, and looking toward a future where their bonds are defined by choice and love rather than blood alone.

The anime The Shiunji Family Children ends with the family coming to terms with the revelation that they are not biologically related siblings, and a subtle hint that among them, there is a pair who are actually blood siblings. The final moments emphasize the ongoing complexity of their relationships and the uncertainty of their future together.

In the final episode, titled "Still," the story unfolds with the Shiunji family grappling with the truth their father revealed earlier--that none of the six children are biologically related. This revelation has deeply affected their sense of identity and family bonds.

The episode opens with the siblings in a quiet, reflective mood, each processing the news in their own way. Arata, the eldest brother, remains a central figure, trying to maintain harmony and support his sisters and younger brother despite his own confusion and emotional turmoil.

As the day progresses, the family members engage in conversations that reveal their inner struggles and hopes. They share moments of vulnerability, showing how the lack of blood ties does not erase the years of shared experiences and affection. The father, Kaname Shiunji, appears intermittently, reinforcing his love and commitment to the family despite the complicated circumstances.

A key scene occurs when the siblings discover a subtle clue indicating that among them, there is actually a pair of real siblings. This discovery adds a new layer of complexity to their relationships, suggesting that the family's story is not as straightforward as initially believed.

The episode closes with a poignant narration stating, "It was too soon for us to learn the truth that among us there was another pair of real siblings," underscoring the unresolved nature of their family dynamics.

Regarding the fate of the main characters:

• Arata Shiunji remains the emotional anchor of the family, committed to preserving their bonds despite the revelations.
• Banri, Seiha, Ouka, Minami, and Kotono Shiunji each face their own emotional journeys but ultimately stay connected as a family unit.
• The younger brother's role is less emphasized but he remains part of the family's collective experience.
• The father, Kaname, continues to be a loving figure, supporting his children through the upheaval.

The ending leaves the family's future open-ended, focusing on their emotional resilience and the ambiguous nature of their biological ties, rather than providing a definitive resolution. This narrative choice highlights the themes of family beyond blood relations and the complexity of identity within blended families.

The TV show The Shiunji Family Children (2025) does have a notable post-credit scene in its final episode (episode 12). After the main story concludes, the scene reveals a significant twist: it hints that among the Shiunji family children, there is another pair of real siblings whose true relationship has not yet been discovered by the characters. This revelation sets up further mystery and potential developments for future episodes or seasons.

This post-credit scene is subtle and cryptic, ending with the line that it was "too soon for us to learn the truth that among us there was another pair of real siblings," implying that the family's complex relationships are deeper than previously known. There is no indication of additional scenes beyond this hint.

No other post-credit scenes or extended after-credits content have been reported for the series as of now.

The romantic complications arise when the Shiunji children, consisting of two brothers and five sisters, discover that they are not actually blood siblings, which changes their perception of their relationships and leads to complex romantic developments.

Each sister experiences the revelation differently, with some struggling with feelings of loneliness due to being lied to, others learning to lean on someone else for support, and some pushing themselves too hard, especially the athlete sister. These emotional responses are central to their character development throughout the series.

The father's long-hidden secret--that the siblings are not biologically related--is revealed when the youngest sister turns fifteen, which serves as the catalyst for the story's romantic and emotional complications among the siblings.

The main siblings are Arata Shiunji, the older brother, Banri Shiunji, the younger brother, and five sisters: Seiha, Ouka, Minami, Kotono, and the youngest sister whose name is less emphasized. Their relationships evolve from typical sibling dynamics to more complicated romantic tensions after learning they are not blood-related.

The series explores the taboo of incest by initially presenting the siblings as a traditional family but then complicating their relationships after the revelation that they are not blood-related. It blends elements of harem anime and romantic comedy while focusing on the emotional fallout and individual character struggles rather than just using the taboo for shock value.

The Shiunji Family Children (2025) is not fully family-friendly for children or sensitive viewers due to its content. It contains moderate sexual content and nudity, including scenes with a woman bathing (though sensitive areas are covered), and sexualized imagery and suggestive dialogue are present throughout the series. There is mild profanity, but no violence, gore, alcohol, drugs, or frightening/intense scenes. The show also involves themes related to complex family relationships that some viewers might find uncomfortable. It is rated for older teens and adults (e.g., Malaysia P16, Taiwan 12+, Vietnam T16).

Potentially objectionable or upsetting aspects for children or sensitive people include:

• Moderate sexual scenes and nudity (non-explicit but frequent)
• Sexualized imagery and suggestive dialogue
• Mild use of profanity
• Themes involving complicated family dynamics that may be confusing or sensitive

There are no violent or frightening scenes, and no substance use depicted.