Changmin and Seohyun are like siblings and they both love each other - in a sibling way. Unfortunately, Changmin's love for Seohyun grows everyday and it no longer can be considered as brotherly love. Changmin keeps his feeling hidden and Seohyun senses no change in her oppa and Changmin is fulfilled; all he wanted is for Seohyun to stay by his side forever.

But things changes when Kyuhyun arrives. He and Changmin are soon friends and Seohyun begins to developed feelings for Kyuhyun. Changmin is heart broken, he cannot confess his feelings to Seohyun but if he does, things would never be the same again and life, as he knew it, would be ruined.

Seohyun

Kyuhyun

Changmin

Soryu