Domestic Girlfriend

Natsuo's life takes an unexpected turn when his father returns home and reveals he has remarried, bringing with him his new wife and her two daughters, Hina and Rui, whom Natsuo knows from his past.

Natsuo is uncertain about his feelings toward a new classmate, while Hina becomes emotionally affected after receiving a mysterious phone call, causing Natsuo to worry.

Natsuo discovers the truth about Hina's enigmatic relationship, leading to a heated confrontation. After leaving home to process his emotions, he begins to form a bond with Rui.

Natsuo and Rui attempt to intervene in Hina's extramarital relationship, but their efforts lead to unexpected complications.

Rui befriends someone with a well-known and controversial past, who also shows interest in Natsuo, creating tension in the group dynamic.

Natsuo faces unexpected consequences after taking a book from the library without proper permission, learning that even small transgressions can lead to serious repercussions.

Natsuo's view of Hina shifts after she shares the story of her first meeting with Shuu. Meanwhile, Rui approaches Natsuo with an unexpected request that leaves him uncertain about how to respond.

As long-buried truths begin to surface, Natsuo finds it increasingly difficult to maintain their deceptions, leading to growing tensions and unintended consequences that affect the entire family.

Hina begins to implement her plan to move out of the shared home, causing concern among her housemates. Rui and Natsuo both try to convince her to stay, though their motivations differ. The episode explores how the household dynamic may change in her absence.

Natsuo suffers a fall down some stairs, resulting in a broken leg, but his troubles escalate when Rui discovers and confronts him about a lie he's been telling.

Rui comes to a decision following a meaningful conversation with Natsuo. Later, during a class field trip to Okinawa, emotions come to the surface amid the vibrant atmosphere of a fireworks display.

After a tragic event, Hina shows her deep feelings for Natsuo by helping him find a new path forward.