A nerd boy who named Kim Kibum (1st year freshman) who is inlove with the school queenka named Jung Krystal(1st year fresh man) , his bestfriend Amber Liu(1st year freshman) help him getting close to Krystal but Amber have a secret crush to him;

Krystal only see Kibum as a fat nerdy boy. Krystal and her friends played "Truth and Consequences", she said Consequences and the dare is to become a boyfriend with the school nerd Kim Kibum in 100 days, Krystal just accept. Krystal and Kim Kibum become a couple in only 100 days, Kibum saw Krystal kissing the school kingka Choi Minho(1st year freshman); Krystal said that couple month is just a game.

His is filled with anger and emotions, Amber is always there to comfort him; he decided to study in America in 3 years with Amber by their family plans.

The old nerdy fat Kim Kibum became to a hot Key, he lost so much weight and grows a 4 pack abs, his good attidude is filled with cold attidude; he came back to have his revenge.

Amber's hair is grown in 3 years but she cut it again, she is now feminine but half tomboy.

A love square is fromed

Minho (growing love with amber)----------------------------Krystal (growing love with key)

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 |                               ♥                             |

  |                                                             |

  |                                                             |

    Amber (loves Key) - - - -           --          ---- Key (revenge to krystal) 

Is Amber going to confess her heart to Key or give it up?

Does Key accept his feelings with Amber or continues loving again with Krystal?

Will MinStal will broke away just their little feeling is within KeyBer?

Just you need to pick on of them

Amber or Krystal?

A piece of my heart, who's the one?

At the last I'll Show you