Yes, there might be some out there. You can check fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Kakashi and Tsunade kiss' on those platforms and you may find relevant stories.
One great fanfiction could be where Kakashi and Tsunade team up for a dangerous mission. In this story, Kakashi's Sharingan skills and Tsunade's medical ninjutsu and brute strength combine in a really cool way. They face off against a powerful enemy who is threatening the Hidden Leaf Village. It shows their different personalities - Kakashi's calm and calculated nature against Tsunade's more fiery and impulsive side.
There are quite a few Kakashi harem Tsunade fanfictions. Some focus on building romantic relationships between Kakashi and Tsunade within the context of a harem scenario. These stories often explore their characters in new ways, perhaps with Kakashi having to navigate his feelings for Tsunade while also dealing with other potential love interests in the harem. It's really interesting to see how different authors handle this concept.
Another theme is adventure. Kakashi and Tsunade going on adventures together, like exploring ancient ninja ruins or searching for lost ninja artifacts. These stories usually involve them facing various challenges and enemies along the way. They have to rely on each other's skills, with Kakashi's combat expertise and Tsunade's leadership and medical skills being crucial.
Their different backgrounds make them an interesting couple in fanfiction. Kakashi, with his experiences in ANBU and his Sharingan - related traumas, contrasts with Tsunade, who has her own history with loss and the weight of leading the village. Their combined experiences can create a rich tapestry of emotions and interactions. For example, they can support each other through their respective griefs.
One common theme is the development of romantic relationships. Since it's a harem concept, there's often the exploration of Kakashi's feelings for Tsunade among his other relationships. Another theme could be the challenges they face together, like dealing with the ninja world's politics or threats while in a relationship.
I'm not sure specifically about a fanfiction involving all of Kakashi, Tsunade and a character named Lemon being pregnant. You could try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own.
One possible plot could be that they are in a dangerous situation together, like facing a powerful enemy. In the heat of the moment, they realize their feelings for each other and share a kiss. Another plot could be that Tsunade is injured and Kakashi, while taking care of her, they have a tender moment and kiss.
One possible plot could be that Lemon is a new character introduced into the Naruto world, perhaps a young kunoichi. She somehow gets involved with Kakashi and Tsunade. Maybe she's part of a mission that goes wrong and she ends up pregnant, and Kakashi and Tsunade have to help her through the difficult situation.
One great 'Tsunade x Kakashi fanfic' is 'The Unlikely Bond'. It delves into how their different personalities, Tsunade's strong - willed and Kakashi's laid - back yet perceptive nature, interact in unique ways. It has a really engaging plot that involves them working together on a mission that goes awry and they have to rely on each other more than they expected.