"0 years old child starting dash story") is a Japanese web novel series written by Umika.

A manga adaptation with art by Reku Hayase has been serialized online via Shusuisha's Shōjo Sengen digital magazine since September 2020 and has been collected in six tankōbon volumes.

A light novel version with illustrations by Hayase began publication digitally under Shusuisha's Shōjo Sengen Novel imprint in September 2023.

A short-form anime television series adaptation aired from July to September 2024, with a second season premiering in January 2025.

Written by Umika, Head Start at Birth was serialized as a web novel on the Shōsetsuka ni Narō website from September 29, 2019 to July 6, 2021.