is a Japanese light novel series written by Yashiro and illustrated by keepout. It began serialization online in August 2018 on the user-generated novel publishing website Shà Âsetsuka ni Narà Â. It was later acquired by TO Books, who have published fourteen volumes since January 2020. A manga adaptation with art by Yokowake has been serialized online via TO Books' Nico Nico Seiga-based Comic Corona manga service since August 2020 and has been collected in seven tankà Âbon volumes. An anime television series adaptation produced by Studio Comet aired from July to September 2025.
Written by Yashiro, Reincarnated as a Neglected Noble: Raising My Baby Brother With Memories From My Past Life began serialization on the user-generated novel publishing website Shà Âsetsuka ni Narà  on August 28, 2018. It was later acquired by TO Books who began publishing the series with illustrations by keepout under their TO Bunko light novel imprint on January 10, 2020. Fifteen volumes have been released as of August 2025.
A manga adaptation with art by Yokowake began serialization on TO Books' Nico Nico Seiga-based manga service Comic Corona on August 31, 2020. The manga's chapters have been compiled into seven tankà Âbon volumes as of July 2025.
The manga adaptation is published in English on NTT Solmare's MangaPlaza website and app.
A stage play adaptation was held at the Shinjukumura Performing Theater in Shinjuku, Tokyo between March 24 and 28, 2021.
Another stage play adaptation featuring an all-female cast was held at CBGK Shikugeki!! between October 18 and 22, 2023.
An anime television series adaptation was announced on July 17, 2024. It is produced by Studio Comet and directed by Masafumi Satà Â, with series composition by Mitsutaka Hirota, character designs by Tomoko Miyakawa, and music composed by Arisa Okehazama. While the series streamed on ABEMA and Crunchyroll from April 20 to June 29, 2025, it aired from July 6 to September 21 of the same year, on Tokyo MX and other networks. The opening theme song is , performed by Wanuka, while the ending theme song is , performed by Ms.Ooja.