The episode begins in 1936, with Natsumi Sekiya, the third daughter of the Sekiya family, being suddenly informed by her father that her marriage has been arranged to Takimasa Ebata, an officer in the Imperial Navy. Natsumi is surprised and unsettled by this news, as she has never met Takimasa before and has no prior romantic relationship with him.

The wedding ceremony takes place without Takimasa's physical presence because he is away undergoing naval training. Instead, Natsumi holds the ceremony with only a picture of Takimasa present. She feels embarrassed and awkward about the unusual circumstances of their marriage, as she cannot hide her discomfort at marrying a man she has never met.

After Takimasa completes his naval training, he returns home, and Natsumi meets him for the first time. Their initial encounter is marked by awkwardness and emotional distance, as Takimasa is shy and stoic, showing little expression of his thoughts or feelings. Natsumi struggles to connect with him but resolves to support him as his wife and to manage the household duties diligently.

Natsumi pushes herself to prepare a nice dinner and keep the house exceptionally clean in anticipation of Takimasa's return, despite feeling physically unwell. When Takimasa finally arrives late at night, he is drunk, which shocks and disappoints Natsumi. She feels hurt and considers his behavior inconsiderate, especially after her efforts to welcome him properly.

A confrontation ensues between them: Natsumi expresses her frustration by beating her fists on Takimasa's chest and pushing him out into the cold. However, she soon regrets this harsh reaction, revealing her deep concern and affection for him. In a vulnerable moment, Natsumi admits that there is no one else she wants to be close to but him, and Takimasa reciprocates this sentiment.

This emotional exchange leads to a breakthrough in their relationship, culminating in the consummation of their marriage. This moment is significant as it marks the beginning of their emotional intimacy and mutual understanding, setting the foundation for their life together despite the challenges ahead.

At the end of episode 1 of "A Calm Sea and Beautiful Days with You" (Season 1, 2025), Natsumi Ebata anxiously awaits the return of her husband Takimasa Takita, who has been delayed by a naval storm. When Takimasa finally arrives home late and drunk, Natsumi initially feels hurt and upset, but they soon reconcile, sharing a tender moment that culminates in them consummating their marriage for the first time.

Expanded narrative of the ending scene by scene:

The episode closes with Natsumi Ebata hearing a radio broadcast about a naval vessel caught in a violent storm off the South Pacific, unable to contact anyone on board. Her worry for her husband Takimasa, who is on that ship, grows intensely, and she is nearly overwhelmed by anxiety. Just as her fear peaks, Takimasa returns home, safe but late.

When Takimasa arrives, he is drunk, which shocks and disappoints Natsumi, who had been eagerly preparing the house and a special dinner for his return despite feeling physically unwell. She confronts him, expressing her hurt and frustration at his inconsiderate behavior. Takimasa, in turn, is remorseful but exhausted from his naval duties.

Their confrontation is emotional but honest, reflecting their open communication style. Natsumi, despite her anger, soon regrets pushing him away into the cold night. She admits her deep worry and vulnerability, confessing that there is no one else she wants to be close to but him. Takimasa reciprocates these feelings.

This vulnerable exchange leads to a significant moment in their relationship: they finally consummate their marriage, marking a milestone in their intimacy and emotional connection. The scene is tender and heartfelt, symbolizing their commitment and mutual support despite the challenges they face.

Thus, the episode ends on a note of reconciliation and deepening love between Natsumi and Takimasa, setting the tone for their life together amid the looming uncertainties of naval service and the era they live in.

Regarding the fate of the main characters at this episode's end: Natsumi remains a devoted and caring wife, grappling with anxiety but determined to support her husband. Takimasa returns safely from his naval mission but is physically and emotionally worn. Their relationship, though tested, grows stronger through honest communication and shared vulnerability. Other characters like Fumiko and Ryunosuke are introduced but their fates are not resolved in this episode.

The TV show "A Calm Sea and Beautiful Days with You," Season 1, Episode 1 (2025), does not have a post-credit scene. The available information about the series, including details from the final episode and Blu-ray/DVD releases, mentions special scenes and bonus footage such as behind-the-scenes content and interviews, but no specific post-credit scene is noted for Episode 1 or any episode.

The closest related content is a special scene released after the final episode involving characters Natsumi and Takita Masaru picking up their wedding rings, and another scene featuring the "Fukafumi" pair, but these are separate from the main episodes and are included as bonus material in the Blu-ray/DVD box set, not as post-credit scenes within the episodes themselves.

Therefore, Episode 1 does not include a post-credit scene.

Natsumi is surprised and embarrassed by the sudden arranged marriage and the fact that Takimasa, her naval officer husband, misses their wedding due to duty. She holds the wedding ceremony with only his picture present and begins her married life feeling awkward and uncertain. Despite this, she supports him as his wife and works hard with housework, gradually opening up to him as she notices his kindness.

Episode 1 highlights the unusual start of their marriage with Takimasa absent at the wedding. Natsumi experiences vulnerability and longing for connection, expressing that there is no one she wants to embrace but him, despite his absence. Their relationship is marked by bashfulness and internal monologues as they navigate their new roles as husband and wife, setting the stage for their gradual emotional closeness.

Natsumi struggles with unfamiliar social expectations, such as joining a gathering of navy officers' wives where she is scolded by the chairwoman for not knowing the proper preparations. She also deals with anxiety and isolation when Takimasa is called away for naval duties, including distress upon hearing that his ship has sunk, reflecting the emotional toll of her husband's military service.

Takimasa is portrayed as a dedicated naval officer whose duties often keep him away from home, including missing his own wedding. Despite his reserved nature and difficulty expressing feelings, he is kind and gradually grows closer to Natsumi. His absences create tension and anxiety for both, but he remains committed to their relationship, visiting Natsumi's family and sharing intimate moments that deepen their bond.

Significant scenes include Natsumi's internal monologue after their first night together, where she worries that Takimasa might despise her for her actions, reflecting her desire to be a proper wife and her bashfulness. Another key moment is Natsumi expressing her longing for Takimasa's presence despite his absence, and Takimasa reciprocating those feelings. These moments reveal their vulnerability, awkwardness, and the slow building of trust and affection between them.

The TV show A Calm Sea and Beautiful Days with You (Season 1, Episode 1, 2025) is generally family friendly with a PG-13 rating. It is a light-hearted romantic comedy set in 1936 Japan, focusing on an arranged marriage and the couple's gradual relationship development. The tone is mostly gentle, wholesome, and calming, with a focus on slice-of-life moments and traditional settings.

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

• The historical context is the years leading up to World War II, which may create an underlying tension, though the show avoids depicting wartime atrocities or graphic violence in the first episode.
• The arranged marriage premise involves some initial awkwardness and moments where the male lead exhibits brief potential for controlling behavior, but these are quickly resolved and do not escalate into abuse or violence.
• There may be mild emotional anxiety related to the uncertainty of the couple's relationship and the male lead's naval duties, but this is portrayed sensitively and without harsh drama.

No explicit content, strong language, or graphic scenes are noted in the first episode or the series overview. The show's focus on gentle romance, traditional culture, and character growth makes it suitable for older children and teens, though very young children or highly sensitive viewers might find the historical backdrop or arranged marriage theme somewhat complex or emotionally nuanced.