(WHICH ONE) The five are all close friends however now they are having problems. Two of the members, Kangmin and Shoot are trying to help out the other three but it's not doing much as they both have their own problems. 
(CROSS IT) The  boys are trying to resort to certain methods to help themselves like imagining a new world or some other things but it's all going in vain. Due to this they are all upset but what they don't know is that Kangmin needs help himself.
(BY MYSELF) The boys can no longer be with each other because they think that the others don't understand their problems so they finally separate.
(HIDE IT) They all go their separate paths now. Unfortunately Shoot's father is an abusive  drunkard and while trying to protect himself and his sister, Shoot ends up killing his father.
(GIVE UP) The boys are all going through shit and remember the times they all were together thinking that maybe things weren't as bad back then. Unfortunately Shoot isn't having the best time and due to the guilt of killing his dad he tries to kill himself. In the outro, we see the members finally give into the temptations of the Devil.
(FACE IT) The boys after having the deal realise that they were all tricked and suffer. In the outro they decide that they need to join hands once again and save themselves.
(TO:GETHER) The boys finally reunite and save themselves. In the outro, they reminisce about the past and cherish their friendship.

The victory they celebrated during ANSWER was about saving themselves and that all the upcoming albums were just flashbacks.

Before the seventh album came out, a single was released for their fans, Peter Pan, as a special gift.

Also once a year ONLY IN JUNE, the main albums come out which are of the storyline. The other comebacks, singles or solos are not related to the main storyline/concept.

AN: If y'all think that the storyline is shitty, I don't blame you. It wasn't really good.