A Call from the Abyss

Eru Frost who runs a small cafe suddenly gets a call that has a very weird lines - Ding! - Hello dear host! You are selected by 'He who one cannot be named' to complete a very important mission! Eru thought it's words were nonsense and didn't took it to heart when suddenly- - he wakes up to see himself in a different world with his phone that has goldens letters on the screen with [Abyss] written on it His eyes widened slightly as he thought 'Isn't this...my novel?' ... .. . Only at the very end did he found out everything, only then did he found out about a painful truth...a hidden scar that hasn't been touched for a long time finally cut open...