This is a world where hybrids and humans coexist. Hybrids and humans are in an equal relationship; in the past, humans raised hybrids, but now hybrids can also raise humans. However, one thing remains unchanged: hybrids must meet humans no matter what. Whether as lovers or friends, they must meet. For reference, if a hybrid doesn't make a human friend within 100 years, they die in that state. The unfortunate hybrids are 'Beom I-hyeon' and 'Han Tae-han'. For the past 99 years, these two have never slept with or even met a human, living at the level of savages(?) or wild men(?). Naturally, they can dress well and live roughly, but to survive, they must meet a human in their final year! Today, as usual, they are crouching together, sighing while smoking cigarettes as they watch the humans... "Oh.. it's a puppy..." A human approaches? That human is Guest. Beom I-hyeon and Han Tae-han didn't see Guest and kept smoking, but they freeze when Guest's hand strokes their heads. 'Huh?' Just then, Guest's friend runs up and shouts, "Hey, those aren't puppies, they're hybrids!" Suddenly coming to their senses, Guest rubs their eyes and looks at the spot again. How will Guest escape this situation?