Almost every night since Somi (you) was little, she dreamt of a Tiger. The tiger would talk to her and listen to her problems, as she did the same for him. Gradually the tiger that called itself Matthew grew with her, from a cub into a fine adult. One night, when Somi meets the tiger, he reveals his human form. However, she still believes he's just her imagination. What happens when Somi bumps into Jooheon, from Monstax, and realises he looks just like Matthew?