Episode list

High school student Yuta Asamura's life changes when his father remarries, moving in with stepsister Saki Ayase and her mother. Despite cautious values, Yuta and Saki navigate their new living situation while maintaining boundaries.

At school, Yuta notices that there are some sensational rumors circulating about Saki due to her striking appearance. When he tries to talk to her about it, it quickly becomes clear that there is much more to the story than the rumors suggest.

Yuta and Saki navigate their new life together, making mistakes along the way. As they learn from their missteps, Saki's feelings toward Yuta become increasingly uncertain.

A month has passed since Yuta and Saki started living together. As Yuta starts to understand the ambiguity of their relationship, Saki asks him for help studying modern literature. The two work together to prepare Saki for a test retake.

Shiori invites Yuta to a late showing of a movie adaptation of a book she enjoys. Saki takes an interest and goes to the bookstore the next day, where she meets Shiori for the first time.

Saki asks her classmate Narasaka Maaya to come over after school and help her study. Yuta decides to make dinner for a change so Saki can keep studying. Maaya helps Yuta with the recipe and then starts interrogating him about his relationship with Saki.

Saki adjusts to her new job over summer vacation. Taichi and Akiko notice that Yuta and Saki keep calling each other by their family names.

Yuta starts to get worried about Saki and asks Akiko for advice. Akiko tells him that he should take Saki out for a break now and then, even if he has to insist. Later, when Yuta tries to talk to Saki about the pool trip with Maaya, Saki reacts harshly.

Saki reflects on her feelings for Yuuta in her diary. A trip to the waterpark leads Yuuta to a realization. After battling her thoughts, Saki decides how their relationship should progress.

A new school term has started, and parent-teacher meetings are on the horizon. At school, Yuta and Saki still have not told anyone that they are siblings. As their mother, Akiko wants to attend both meetings, but she worries it would expose their secret.

When Yuta is killing time in the library, Maaya confronts him and asks if he has feelings for Saki. After the parent-teacher meetings, Saki attends the open campus event at a prestigious women college and is confronted by a nosy professor

Saki spends time with Maaya and friends while Yuta gets to know Fujinami. In their own separate ways, Saki and Yuta start to understand the feelings connecting them... in this story of a relationship that may one day become love.