TV series
When his father remarries, Yuta Asamura winds up sharing a roof with his new stepsister, Saki Ayase, the hottest girl in his grade. Carrying the scars of their parents’ troubled divorces, they vow to maintain a respectful distance. But what starts as cautious camaraderie blossoms into something deeper from shared experiences. Is it admiration, familial love, or something more?
Streaming, rental and purchase options
Checked Sep 3, 2026
Days with My Stepsister is available to stream on Crunchyroll Premium and Crunchyroll Premium (Via Amazon Prime) in United States. You can also buy it from Amazon and Apple TV. Use the direct links below to open the provider.
When his father remarries, Yuta Asamura winds up sharing a roof with his new stepsister, Saki Ayase, the hottest girl in his grade. Carrying the scars of their parents’ troubled divorces, they vow to maintain a respectful distance. But what starts as cautious camaraderie blossoms into something deeper from shared experiences. Is it admiration, familial love, or something more?
Choose an episode, then use the watch options above for the show.
Episode 1
High school student Yuta Asamura begins living with his stepsister Saki Ayase and her mother due to his father's remarriage. Both Yuta and Saki, who hold cautious values regarding relationships between men and women, agree to live with an appropriate sense of distance between them.
Directed by Taiei Andou, Mizuki Kobayashi, Naoki MurataWritten by Mitsutaka HirotaGuest stars Yuna Kume
Episode 2
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.
Directed by Shun NakajimaWritten by Mitsutaka HirotaGuest stars Minami Hinata
Episode 3
Yuta and Saki take turns making missteps in their new, still somewhat awkward home life together. As they reflect on these mistakes and figure out how to move forward, Saki realizes she's less and less sure how to feel about Yuta.
Directed by Naoki Murata, Souta Ueno, Taro KuboWritten by Mitsutaka Hirota
Episode 4
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.
Directed by Taiei Andou, Naoki Murata, Shun NakajimaWritten by Kana YamadaGuest stars Motoharu Ono, Natsuko Abe
Episode 5
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.
Directed by Mizuki KobayashiWritten by Megumu SasanoGuest stars Natsuko Abe
Episode 6
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.
Directed by Shintaro ItogaWritten by Kana YamadaGuest stars Suzuka Kimura, Takehiro Hasu, Takuya Masumoto, Yuga Sato
Episode 7
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. Saki senses a change in how she feels about Yuta and wonders if she should describe it honestly in her diary.
Directed by Souta Ueno, Taro KuboWritten by Mitsutaka Hirota
Episode 8
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.
Directed by Takayuki HamanaWritten by Megumu SasanoGuest stars Shizuka Ishigami
Episode 9
Yuta and Saki accept Maaya's invitation to go to the pool with a group of friends. Saki enjoys the time at one of her favorite places and is finally able to let loose a little. Then, on the way home, Saki blurts something out that leaves Yuta speechless. (Subs Flix_)
Directed by Mizuki Kobayashi, Souta UenoWritten by Mitsutaka HirotaGuest stars Daishi Kajita, Minami Hinata, Motoharu Ono, Shizuka Ishigami
Episode 10
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.
Directed by Shun NakajimaWritten by Kana YamadaGuest stars Daishi Kajita, Minami Hinata, Motoharu Ono
Episode 11
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's college and is confronted by a particularly nosy professor.
Directed by Taiei Andou, Shintaro ItogaWritten by Mitsutaka HirotaGuest stars Nanako Mori, Takuya Masumoto
Episode 12
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.
Directed by Mizuki Kobayashi, Souta Ueno, Shintaro ItogaWritten by Mitsutaka HirotaGuest stars Ghost Mikawa
Episode information updated Sep 17, 2026
Kohei AmasakiYuta Asamura (voice)
Yuki NakashimaSaki Ayase (voice)
Minori SuzukiShiori Yomiuri (voice)
Ayu SuzukiNarasaka Maaya (voice)
Daiki HamanoTomokazu Maru (voice)
Chikahiro KobayashiTaichi Asamura (voice)
Reina UedaAkiko Ayase (voice)
Atsumi TanezakiKaho Fujinami (voice)
AT-XJapan
Studio DeenJapan
KADOKAWAJapan
Nippon ColumbiaJapan
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