Visitor from Paradise

The main setting is Escape from Tarkov. The protagonist, PMC Charlie, played Blue Archive before entering Tarkov. After the Tarkov conflict broke out, he became trapped there. One day, after scavenging, he returned to his hideout and went to sleep. When he woke up, a large number of Blue Archive characters (students) had appeared in his hideout and were calling him “Sensei.”

The protagonist PMC’s name is Charlie. The students who transmigrated include the Abydos Countermeasures Committee, the Fox Squad, the Remedial Class, the Maid Club, the Tea Party, and the Prefect Team. More will be discovered later (the girls are all high school students).

Charlie used to be a pretty decent person, but Tarkov’s brutal reality has clearly left him with no choice but to face things as they are.