Other name: プリンセス・ルシア, 恶魔公主露茜娅, ลูเซียปีศาจสาวจอมป่วน, 魔界公主, 프린세스 루시아
Summary: Koizumi Yuta is a 14 year old boy who has quite a bit of a problem. The princess of the magical world, Lucia, has to procreate with him. That child would have the ability to engulf the entire world for 7 whole days. Mikamoto El and Kasukabe Rie are the two angels assigned to make sure that doesn't happen. Kasukabe Rie happens to be the girl he likes. Just how is he going to survive this ordeal? Note: This series is bi-monthly, so chapters will be released slowly.