Tenkō-saki no Seiso Karen na Bishōjo Anime Release Date 2026: Tenbin 2nd Teaser & Ikumi Hasegawa Cast

The official website for the television anime adaptation of Yu Hibari and illustrator Shiso's Tenkō-saki no Seiso Karen na Bishōjo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi Datta Ken (The Neat and Pretty Girl at My New School Is a Childhood Friend of Mine Who I Thought Was a Boy), also known by the short title Tenbin, unveiled the second teaser promotional video and visual on Wednesday, December 23, 2025. The second teaser confirmed the 2026 debut and presented new key art and a trailer, building anticipation for this top-tier gap moe romance anime. The anime will star Ikumi Hasegawa as Haruki Nikaidō, the female protagonist who was once mistaken for a boy by her childhood friend. Hasegawa is a high-authority voice actor known for her roles in 86 and Bocchi the Rock!, and her involvement in the project adds significant appeal to the adaptation. The casting announcement provides fans with their first look at the voice talent that will bring this heartwarming story to life. The anime adaptation was first announced on September 24, 2023, during a livestream event. The release of the second teaser video and visual marks significant progress toward the 2026 premiere. The promotional materials showcase the visual style and character designs that will define the series, giving viewers a preview of what to expect from the adaptation. The youth romantic comedy story centers on Hayato Kirishima, a transfer student who moves to a city school. There, he is reunited with Haruki Nikaidō, his childhood friend whom Hayato remembers as a boy from seven years prior but finds she is now a refined young woman and the school idol. The story focuses on rekindling childhood friendship after the protagonist reunites with his friend, who he once thought was a boy. Haruki maintains a sophisticated image publicly but reveals her more familiar, less refined personality only to Hayato, creating a unique "gap moe" dynamic that is the series' primary selling point. The premise of childhood friends reuniting after years apart, with one discovering that their friend's gender was misunderstood, creates a unique dynamic that combines elements of nostalgia, comedy, and romance. The series is notable for the heroine's transformation from a tomboyish friend to a "refined beauty," and it focuses on the rekindling of a childhood connection, complicated by the protagonist's past perception of his friend as a boy and her dual personality. The story's focus on the contrast between Haruki's public refined image and her private casual personality with Hayato provides both humor and emotional depth, creating a compelling "gap moe" romance that will appeal to fans of series like The Angel Next Door Spoils Me Rotten. Yu Hibari launched the original light novel series as a web novel on the Shōsetsuka ni Narō ("Let's Become Novelists") website in June 2020, where it gained popularity among readers. The first print volume was published by Kadokawa Sneaker Bunko in February 2021, bringing the story to a wider audience through physical and digital releases. Kadokawa published the light novel's ninth volume on August 29, 2025, demonstrating the series' ongoing popularity and continued story development. Kina Ōyama launched the manga adaptation, which ran from September 2021 to June 2025, concluding with 7 volumes. The manga was serialized on the Niconico Seiga website, providing readers with a visual interpretation of the story. The manga adaptation has helped expand the series' reach, introducing the story to readers who prefer visual storytelling, and its completion in 2025 provides a complete story arc for fans to enjoy. The announcement of the second teaser video and visual comes as the anime production continues to progress toward its 2026 premiere. The promotional materials provide fans with updated information about the adaptation, including character designs and the overall visual aesthetic that will define the series. The teaser video likely previews key moments from the story and gives viewers a sense of the animation quality and storytelling style. The casting of Ikumi Hasegawa as Haruki Nikaidō brings an experienced voice actor to the role, ensuring that the character's personality and emotional journey will be well-portrayed. Hasegawa's involvement in the project adds to the anticipation surrounding the anime, as fans look forward to hearing how the voice cast will bring the characters to life. As the 2026 premiere approaches, fans can expect more promotional materials, including additional character visuals, trailers, and cast announcements. The second teaser video and visual represent important milestones in the anime's production, signaling that the adaptation is moving forward and bringing the beloved light novel and manga series to animated life. As of late 2025, the director and animation studio have not been announced, though Kadokawa is involved in the production. The story's exploration of childhood friendship, mistaken identity, dual personality, and romantic development resonates with readers who enjoy stories about reconnecting with the past and discovering new aspects of familiar relationships. The anime adaptation will bring these themes to a wider audience, introducing the series to viewers who may not have encountered the light novels or manga. Fans can follow updates on the official website (tenbin-anime.asmik-ace.co.jp) and the official X (Twitter) account (@tenbin_anime) for the latest news and announcements.