A sibling romance will come with Gimai Seikatsu

During the AnimeJapan 2024 event, the first promotional video for the anime adaptation of the light novels written by Ghost Mikawa and illustrated by Hiten, "Gimai Seikatsu (Days with My Step Sister)", was revealed. The video confirms that the premiere is scheduled for the Summer-2024 season (July-September) in Japan and lists the production details of the project.
Ghost Mikawa began publishing the light novels through Kadokawa in January 2021, with illustrations by Hiten. A manga adaptation by Yumika Kanade has been published through Kadokawa's Shounen Ace Plus magazine since July 2021.
Voice Cast
- Yuki Nakashima as Saki Ayase
- Kouhei Amasaki as Yuuta Asamura
- Ayu Suzuki as Maaya Narasaka
- Daiki Hamano as Tomokazu Maru
- Minori Suzuki as Shiori Yomiuri
Production Equipment
- Soudai Ueno (Hataraku Saibou, Fairy Gone, Sasaki to Miyano) is directing the anime at Studio Deen.
- Mitsutaka Hirota (Kanojo, Okarishimasu, Seirei Gensouki, Pocket Monsters: THE ORIGIN) is writing and supervising the scripts.
- Manabu Nii (Shigatsu wa Kimi no Uso, Akiba Meido Sensou, Carole & Tuesday) is in charge of character design and animation direction.
- CITOCA is in charge of the composition of the soundtrack.

Synopsis of Gimai Seikatsu
After her father's remarriage, Yuuta Asamura ends up having a new stepsister, coincidentally the number one beauty of the school year, Saki Ayase. Having learned important values in relationships between men and women through their parents' previous ones, they promise each other not to be too close, not too far away, and simply to keep a vague and comfortable distance.
On the one hand, Saki, who has worked in solitude for the sake of her family, doesn't know how to properly trust others, while Yuuta isn't sure how to really treat her. Standing on fairly equal ground, these two slowly learn the comfortable feeling of living together. Their relationship slowly evolves from being strangers as the days go by. This is a story that may lead us to love one day.
Source: Comic Natalie
(c)三河ごーすとHiten/KADOKAWA/義妹生活製作委員会