Peaceful lies, right? That sounds like Maruki and his false reality he made using his persona's power once. It was a world that made everyone happy, but it wasn't real. He really meant well and didn't want anyone to suffer. He didn't understand that without pain, you don't change or grow as a person.

We managed to stop him and restore reality back to normal, as well as make him see he was wrong.

[He may likely leave out the part about his friends being under Maruki's control at first. Seemingly preferring that reality over the old one.]