>> Jun/AUs
Junichirou is a royal knight who gets chosen to be in knight captain D's trusted squad of knights. He had wanted to be a knight from a young age, a dream his family and his best friend Yamato reluctantly supported. He is unaware of falling in love with D at first sight, he thinks his feelings are more platonic than romantic. He doesn't even dream of keeping D to himself, knowing his captain's heart belongs to the crown prince, he's satisfied with whatever D wants to give him, even if it never goes beyond a purely physical relationship.
He does have a hard time adjusting to not being with him when D decides to stop seeing him and the rest of his knights for sex about a year before Boutarou's crowning but his dearest Yamato comes to visit him often to give him his support and whatever he needs. Despite all this he can't help shedding tears when Boutarou gets crowned and they announce their marriage a year later.
Fortunately for him D can't manage to forget about him either despite being in love with Boutarou, he has to tell his darling about his knight. After a heavy conversation Boutarou tells D he wants to get to know Jun so they start seeking his company more and more often, taking him on dates, which Jun is convinced are just him escorting the two of them on their dates. Boutarou ends up really liking him so they tell him they want to take him as their boyfriend but in classic himbo fashion the whole conversation flies above Jun's head, he's not aware of their new relationship status until weeks later. When he finally realizes he couldn't be happier to be with the both of them.
Jun lived a life in a small rural town as an orphan neglected by the townspeople till they finally chose him as a sacrifice for a god named D to do with as he wishes in exchange for fortune for their town. He doesn't know what to expect as a sacrifice when D takes him away but the gorgeous god poses him a deceptively simple challenge of satisfying him, which he does pass, earning him a life of pleasure in his servitude. He's ready to do anything for his god who treats him better than his town ever had - so he happily slaughters them to prove his loyalty. When Ilyas stumbles in their temple and D takes interest in him Jun can't help being jealous but he warms up to him quickly, doing his best to protect the disobedient toy from D's harsher punishments, until Ilyas learns not to defy his master.
Junichirou is living a peaceful life in a small town with his dearest Yamato until one day he hears about the arrival of a new priest in town. He has to see him for himself dragging Yamato along and quickly develops a crush on the mysterious and handsome priest D. His loosely religious family is surprised by his sudden interest in going to church but they support him. He couldn't be happier when D shows interest in him, inviting him to stay and tend to the church with him - an excuse to get him know more intimately, but before they could get into it, Yamato appears. Jun wanting to include his beloved asks him to come closer and join them.
Jun is D's guardian angel who he ends up falling for. He's very close to his fellow angel Yamato, going as far as calling him his own guardian angel, a concept that makes Yamato very flustered. As angels they're not supposed to be in contact with the human they're tasked with protecting but when he saves D from a would-be-fatal accident, he seduces him easily, convincing him to stay longer and come visit him often. Unbeknownst to him, being with D is slowly corrupting his divine body and soul.
Jun is the prime example of a succubus: driven by desire and always ready to take more and drown in pleasure. He's obsessed with Yamato, his friend he's been very close to since they were young demons. He's had a crush on him for years and readily offered himself to him when their need started manifesting but Yamato refused, not wanting to use his angel like that (completely unaware of the fact that Jun is in love with him). He doesn't deny himself like his dearest does, but his yearning leads him to find humans who physically resemble him. After Yamato returns from spending a long night with D, he's overtaken by lust rather than jealousy. He comforts his best friend but he can't stop thinking about him and D and how badly he wants to see them like that and also participate in the fun. Next time Yamato starts going hungry he readily gives him what he needs, confessing how much he'd wanted to do this for so long. He's not giving up on finding D either but he finds them instead. Jun hangs onto his every word and almost begs D to repeat that night with Yamato, but luckily for him he doesn't need much persuasion.