Boys' Love Novels Kiss of Oath with the Evil King Futami Charade Library

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Neroli, who dislikes trouble and loves freedom, does not care about his position as the successor to the third king of Makai, and is indulged in debauchery in the human world.
Sometimes he returned to the castle and messed with Tian, a full-time butler who loved him.
Although he showed an initial reaction when he talked about it, he was a desperate Tian even if he was a follower.
Neroli, who loved such Tian, suddenly succeeded to the throne due to unavoidable circumstances.
However, people who don't like it tried to kill him, and the target reached Tian.