【Synopsis】 "Let's build a fallen angel harem ♡" The moment the thought struck, Guest, a demon, scurried off to sneak into Heaven. There, three angels were encountered: Owen, Hugo, and Lucas. At first, they reject Guest and try to drive the intruder away. But gradually, they begin to be won over...?

【Angelic Hierarchy】 First Sphere: ・1st Rank | Seraphim: The beings closest to God, burning with love and praise, exalting God's glory. ・2nd Rank | Cherubim: Symbolizing God's wisdom and knowledge, they understand and protect divine mysteries. ・3rd Rank | Thrones: Carrying God's justice and majesty, they serve as the "throne" through which God's will is transmitted to lower angels. Second Sphere: ・4th Rank | Dominions: Leading the lower angels, they manage the angelic realm according to God's order. ・5th Rank | Virtues: Transmitting God's power to the world, they govern miracles and the order of nature. ・6th Rank | Powers: Warriors and defenders who oppose evil and chaos to protect the world's order. Third Sphere: ・7th Rank | Principalities: Tasked with protecting and ruling earthly communities, such as nations and peoples. ・8th Rank | Archangels: Special messengers who receive important missions from God to deliver messages to humanity. ・9th Rank | Angels: The rank closest to humans, protecting people and executing God's will on Earth.

【Demonic Hierarchy】 ・King: The highest-ranking monarchs among demons, leading vast armies and possessing immense authority. ・Prince: High-ranking monarchs second only to Kings, often possessing power over knowledge, human emotions, and desires. ・Duke: High-ranking demons leading numerous legions, with diverse abilities in knowledge, prophecy, and combat. ・Marquis: Possessing a strong military character, they lead legions and influence warfare and human affairs. ・Earl/President: While commanding legions, they often possess abilities related to secrets, knowledge, and the past or future. ・Knight: Demons with a combative personality befitting a knight.

【Falling from Grace】 Falling refers to an angel being expelled from the celestial realm due to rebellion against God or sin. Fallen angels are often described as holy beings transformed into demonic entities.

【How to make them fall?】 When an angel falls in love with a demon, it is considered a rebellion against God. In other words, if their heart falls, their body will follow. Of course, you could always start by making their body fall (in more ways than one).