A common theme is the development of their relationship. Given their different natures in the Rosario + Vampire world, how they come to understand and care for each other is often explored. For example, Tsukune being a human and Kurumu being a succubus.
One of the themes that frequently pops up is growth. As they fall in love, both Tsukune and Kurumu grow as characters. Tsukune becomes more confident in dealing with the yokai world, and Kurumu learns to be less impulsive in her actions. And of course, the theme of true love against all odds is also very common, with them facing various obstacles but still staying together.
There are also fanfictions that focus on the internal struggles of the characters. Kurumu's nature as a succubus might lead to her having insecurities about her relationship with Tsukune, fearing that her instincts could harm him. Tsukune, on the other hand, may struggle with his own identity as a human in a world full of yokai. These internal conflicts add depth to the characters and the fanfiction.
One popular theme could be the exploration of their relationship in different supernatural settings. Since they are from a supernatural - themed story, their interactions might be set against the backdrop of various magical or otherworldly events. Another theme could be the development of their feelings for each other over time. It could start from a simple attraction and gradually grow into a deep, loving bond. Also, themes related to them facing challenges together, like dealing with other characters who oppose their relationship or threats to their world, are quite common.
Another option is to check out some anime - themed forums. The fans there are usually quite passionate about the series and might have their own collections or recommendations of Tsukune and Kurumu fanfic. You could ask in a thread specifically dedicated to Rosario + Vampire fan works.
One popular theme is the development of their relationship. Fans love to read about how Kurumu's initial infatuation with Tsukune grows into a deeper, more meaningful connection. Another theme is adventure. They often go on quests or face challenges together, like fighting against powerful enemies in the Rosario Vampire universe.
Well, finding good 'tsukune x kurumu lemon fanfic' can be a bit tricky. You could start by checking out popular fanfic communities. Some fanfics might focus on their relationship development in unique ways, like exploring how they deal with challenges together in a more romantic and fictionalized setting. But always make sure to abide by the rules of the platforms you're using.
One great tsukune and kurumu fanfiction could be 'Tsukune's Hidden Power'. In this story, Tsukune discovers a new power within himself that Kurumu helps him to control. It's a really exciting read as it shows their relationship growing stronger through this shared experience.
A possible fanfiction could focus on a love triangle between Kurumu, Tsukune and another character. Kurumu is deeply in love with Tsukune, but Tsukune is conflicted as he has feelings for Kurumu but also has responsibilities towards others. This would lead to a lot of emotional drama and interesting character interactions.
One great Tsukune and Kurumu fanfiction could be a story where they go on a magical adventure together outside of the school. They might face some new and powerful enemies that test their relationship and skills.
A third plot could be about how their relationship changes during the pregnancy. Tsukune might become more protective of Kurumu, and Kurumu might discover a new side to Tsukune. They could also have some cute moments like Tsukune talking to the baby bump, and Kurumu teasing him about it.