Description: "A monster girl who falls in love with humans will turn into thousands of fireflies and disappear in an instant" is an irresistible "rule" of nature. But love is irresistible, love is "out of control" in all circumstances. The two who can't really get close, but the bond is getting deeper and deeper, and it even becomes the only reason for each other to live in this world. So, what choice should you make? This seems to be a dilemma for which there is no cure. You have been given a mission to start a new adventure in your life, and it's up to you to make a difference.