Perhaps the succubus is on a mission to corrupt Johnny Blaze, but as he resists, she starts to question her own evil ways. This could lead to a journey of self - discovery for the succubus and a test of Johnny Blaze's willpower. They could form an unlikely alliance to fight a greater evil that threatens both their worlds.
Johnny Blaze could also be on a path of redemption himself, and the succubus becomes a part of that journey. Maybe he has made some mistakes with his powers in the past, and by helping the succubus turn away from her evil nature, he finds his own redemption. Their relationship could be a catalyst for both of them to become better beings.
Another plot could be that they are both on a volunteer trip abroad. They initially don't get along well. Celia thinks Johnny is too reckless and Johnny thinks Celia is too uptight. But as they face various challenges during the volunteer work, such as building houses for the locals or teaching children, they see different sides of each other and form a deep connection.
Well, perhaps the succubus is sent by an enemy of the gods to disrupt Percy's relationships with his friends. She starts causing jealousy and strife among them by using her alluring powers. Or maybe she's tied to an ancient prophecy that Percy is involved in, and he has to either defeat her or convert her to the side of good to fulfill the prophecy.
One interesting plot idea could be Johnny getting transformed into a different creature and having to navigate his daily life in that form. For example, he turns into a small, furry animal and has to deal with his sisters' reactions, which might range from shock to over - protectiveness. Another could be a TG (transformation genre) where he and his dog Dukey swap bodies and hilarity ensues as they try to act like each other. A third idea might be Johnny being transformed into a superhero - like being but with some comical side - effects, like his powers only working when he sneezes.
Perhaps Johnny is a reincarnation of someone from Dracula's past, like a long - lost love. Dracula initially wants to use Johnny for his own purposes but then realizes the depth of their connection and has to choose between his dark nature and this new relationship.
One idea could be a forbidden love story where a human falls in love with a succubus. The succubus is initially only interested in his energy but gradually develops real feelings. Another could be a story set in a magical academy where a succubus uses her kiss to gain an advantage in a competition, but then finds herself falling for one of her rivals.
Maybe a group of succubi are summoned accidentally in the Naruto universe. They cause chaos as they are used to a different kind of world. Naruto and his friends have to figure out how to send them back without harming them, while also dealing with the succubi's alluring powers that are affecting some of the villagers.
One idea could be that Silver and Blaze are in a dangerous situation, like facing a powerful enemy. In the heat of the moment, they share a kiss as a sign of their unspoken bond and new - found courage. It could be a moment of realization for both of them about their deeper feelings.
They could be in a situation where Ponyboy gets sick and Johnny takes care of him. During this time, they reminisce about their past memories, like the time they first became friends. As Ponyboy recovers, they decide to do something special like paint a mural on a wall in their neighborhood. This not only shows their friendship but also gives a chance to add some creativity to the fanfiction.
One idea could be that Danny Phantom, while dealing with his normal ghost - fighting duties, attracts a succubus who then creates a harem of various characters from his world. Maybe they all have to work together to fight off a greater evil that is attracted to the combined energy of the harem.