Conan Brown has the ability to teleport to places through the rain. On an unexpected event, Conan didn't expect to teleport in the past wherein the Kingdom of Sapporo is still not in history. There, he will meet the King and his people. Unfortunately, he couldn't go back. The Kingdom has been suffering from a drought for almost a year. In order to go back to the present, it must rain. But what will happen if he will become the King's personal eunuch and slowly, he will fall in love for him? Will he still stay in the past even if the rain will come? Or he will leave everything and go back to the present where he truly belongs?