"The innocent and lovely girl I transferred to turns out to be my childhood friend who I used to play with, thinking she was a boy" TV anime adaptation

It has been announced that the light novel "The Innocent and Beautiful Girl at My New School Turns Out to be My Childhood Friend Who I Used to Play With, Thinking She Was a Boy" from Kadokawa Sneaker Bunko (KADOKAWA) will be adapted into a TV anime in 2026. It has also been announced that voice actress Ikumi Hasegawa will play the main character, Nikaido Haruki.

The work is a light novel written by Hibari Yu and illustrated by Shiso. The story is about a boy who transfers to a high school in the city and reunites with a male friend he made an important promise with when he was young, for the first time in seven years, only to find that the male friend has now become a beautiful, innocent girl... It depicts a romantic comedy between a boy and his childhood friend, a former "male friend" who is now a "beautiful girl." The comic adaptation has also gained popularity, with the total number of copies sold in the series exceeding 400,000.

A teaser visual and teaser PV have been released, depicting the main character, Nikaido Haruki, wearing a white dress.

Original author Hibari Yu commented, "Is there a good real-life location for the background of the teaser visual? When the idea came up, I immediately sent a photo of this place. When I first started writing Tenbin, I was writing about rural landscapes and I thought this photo of a rural scene in Nara would fit the image perfectly (although there are no actual sunflowers in bloom...). It's very moving to see it used as the teaser visual! This is a work that is packed with all my love. I'm looking forward to it airing. Meow!"