Eternal Boys Side Project is an audio novel game developed by coly Inc..

It is scheduled to be released in early 2023.

Eternal Boys (永久少年, Eikyū Shōnen) is an original Japanese anime television series animated by Liden Films. The series is set to premiere on Fuji TV on October 11, 2022.The story depicts six middle-aged men who have experienced success and failures in their lives. One day, they decide to become an idol group and overcome such barriers as their age and their physical condition.

Two idol groups which are scheduled to appear in the anime have been announced as character information for the app.

They are the 6-member idol group "Story of Love" and the national idol group "Gentlemen". 

Official site: https://eternalboys-sp.com

Twitter: https://twitter.com/eternalboys_sp