Resume : The Earth and the Moon's Sphere Kingdom have long had a poor relationship due to a devastating war years earlier, but Sphere Kingdom Princess Feena Fam Earthlight seeks to make steps towards changing that by doing a homestay on Earth at the home of the Earth President's secretary, in order to learn more about life on Earth. This is not the first time that Feena and the secretary's teenage "brother" Tatsuya have met, though, and the connection of the past contributes toward love in the present. Their love could paint a new future for Earth-Moon relations, but the resulting complications also threaten to tear everything - even the fragile international peace - apart.
The moon and the earth are linked by a single contact point, "Mitsuru ga Sakichau Ouren Rakuniushi" where Tatsuya lives under the supervision of the Sphere Kingdom (Moon Kingdom)'s Princess Feena Fam Earthlight who is coming to stay at his home.