Days with My Stepsister

After his father's remarriage, Yūta Asamura finds himself getting a new stepsister, Saki Ayase, who happens to be the hottest girl in his grade, and living together with her. Having learned the important values about man-woman relationships, seen through their parents as they carry the scars of their parents’ troubled divorces, and in order to not cause discord in the family, Yūta and Saki promise to keep a reasonable distance from each other, not to be too close or too opposing. Saki, who is longing for affection from her family and worked in solitude for their sake, does not know how to depend on others, while Yūta is bewildered at how to properly connect to Saki as his younger sister. Feeling somewhat similar, the two of them gradually feel comfortable living together. But what starts as cautious camaraderie blossoms into something deeper from shared experiences. Is it admiration, familial love, or something more? == Characters ==

; : : The protagonist of the Days with My Stepsister series. He is Saki's step-brother and a second-year high school student. He works part-time at a bookstore. Although he and Saki initially have a distant relationship, he develops feelings for her, triggered by the sight of her during a visit to the swimming pool ; : :She is Yuuta's step-sister and a second-year high school student. She has the appearance of a gyaru. She later works part-time at the same bookstore Yuuta works. Although she and Yuuta initially have a distant relationship, she develops feelings for him, triggered by him turning down her offer to have sex with him and talking about their issues about their former mother/father. She later cuts her hair short which later regrows back to its original length in later volumes. ; : : Yuuta's friend at school. He is a member of the baseball team and an otaku. ; : : Saki's friend at school. She is always cheerful and meddlesome. She got increasingly involved with Saki because she could not stand to see her isolated, and later became her friend. ; : : A university student who works part-time as a senior to Yuuta at the bookstore. ; : : Yuuta's father and Saki's new step-father. After divorcing his ex-wife for various reasons, he re-married to Akiko. He has a good relationship with Yuuta and Saki. ; : : Saki's mother and Yuuta's new step-mother. After divorcing her ex-husband, she worked tirelessly to provide for Saki until she re-married to Taichi. She was a gyaru during her high school years. ; : ; : ; : == Media ==

YouTube channel While writing several works, author Ghost Mikawa learned of the existence of a reader who had a request to "deeply dig into the daily life of the characters". He was interested in seeing what would happen if he tried to write an unusual work, and decided to write a story depicting the relationship between step-siblings. According to Mikawa, the writing style of each writer is shown in each script, so it is often taken as it is. Light novels The light novel series is written by Ghost Mikawa and features illustrations by Hiten. It is published by Media Factory under their MF Bunko J imprint, with the first volume being released on January 25, 2021; sixteen volumes have been released as of February 25, 2026. Spin-off Ghost Mikawa has also worked on a spin-off, focusing on Shiori Yomiuri and his comment of each anime episode titled, . It is published by Media Factory under their MF Bunko J imprint. Manga A manga adaptation with art by Yumika Kanade began serialization in Kadokawa Shoten's Shōnen Ace Plus online web service on July 16, 2021. During their Anime NYC 2023 panel, Yen Press announced that they also licensed the manga for English publication. }}}} }} • Bonus Manga}} }}}} }}}} Others An art book is published by Kadokawa. Anime In July 2022, during the "Natsu no Gakuensai 2022" event for MF Bunko J, an anime television series adaptation was announced. The cast of the YouTube channel are reprising their roles. It is produced by Studio Deen and directed by Souta Ueno, with scripts written by Mitsutaka Hirota, characters designed by Manabu Nii, and music composed by Citoca. The series aired from July 4 to September 19, 2024, on AT-X and other networks, with Crunchyroll streaming the series worldwide outside of East Asia. The opening theme song is performed by fhána, while the ending theme song is performed by Kitri. Episodes == Reception ==

In the 2022 edition of Takarajimasha's annual light novel guide book Kono Light Novel ga Sugoi!, the novel series ranked 7th in the bunkobon category, and 3rd in the new work category. By January 2024, the series had over 600,000 copies in circulation. == See also ==