The original light novels come from creator Kazuha Kishimoto which began in 2015 and wrapped up in 2016 after starting online initially.
The light novel series Summoned to Another World for a Second Time was announced as getting an anime adaptation at the end of October 2021 and now some new details have come in.
Various epilogue chapters were written over the next few years while the manga adaptation began in 2018 and has seven volumes released so far.