The Neo Culture Technology School has been well known for its outstanding academics, the perfect sports team, and the kind and wonderful behavior of it’s students. Its clubs, called units, may not be the most known thing about the school, but when a group of intergalactic invaders attack the US and threaten to attack their city in South Korea as well, 21 boys from 4 units stay behind and discover new friendships, secrets, and love along the way and helping each other survive while they protect the one place they call home.