Tag is to be used ONLY if the protagonist of the series can make clones or has clones (definition may vary based on novel). If the series has multiple protagonists, only use this tag if having clones or making clones is a prominent feature of one of them.
On a normal boring day, a message appears, inviting him to a Tutorial. A tale about Lee Ho Jae and his escape from the Tutorial. But he just happened to choose the hardest possible difficulty: Hell.