There are two kinds of people with special abilities: villains,
who are driven by their evil desires, and psykers,
who pursue justice and work against villains.
Cassian Lee is a very powerful psyker with a good heart.
But one day, when he visits his friend in Greece,
things take a wrong turn. Following an unexpected chain of events,
Cassian ends up in the body of a Korean high school boy…
who has just become a villain! Will his sense of justice win in the end
or will he end up becoming a cold-blooded villain?