The theme of sacrifice also appears often. Mika might be willing to sacrifice anything and anyone for Yuu's sake. This shows the depth of his yandere - like love. Additionally, there's the theme of internal conflict. Yuu may struggle with his feelings towards Mika, as he has to deal with Mika's over - the - top behavior while also having his own emotions for Mika.
One common theme is possessiveness. As Mika is the yandere in this pairing, he often shows extreme possessiveness over Yuu. He doesn't like Yuu being close to others and will go to great lengths to keep Yuu to himself.
Survival is another theme. Since they are often in a difficult world setting, their fight for survival together and how that impacts their relationship is a key aspect in many Mika x Yuu fanfics. In some stories, they have to rely on each other against powerful enemies and harsh environments.
Another theme is sacrifice. In many fanfictions, either Mika or Yuu is willing to sacrifice themselves for the other's well - being. For example, they might put themselves in danger to protect the other from harm.
One common theme is the struggle between their different natures. Since Yuu is a demon and Mika is a vampire, there's often a conflict and a need to overcome their natural instincts to be together.
One common theme might be the relationship between Mika and Yuu, exploring their deep connection and how they interact with each other in different situations.
One popular 'yandere Mika x Yuu fanfic' is 'Fateful Obsession'. It delves deep into Mika's yandere tendencies towards Yuu. The story is filled with intense emotions as Mika's possessiveness over Yuu drives the plot. The author does a great job of portraying the complex relationship between them.
One common theme is loyalty. Mika's possessiveness can be seen as an extreme form of loyalty towards Yuu. Another theme is protection. Since Mika is possessive, he often tries to protect Yuu from any harm. And there's also the theme of jealousy. If other characters get too close to Yuu, Mika's possessive nature will make him jealous.
The theme of redemption is also common. If Mika has done something he regrets, Yuu might be the one to help him find redemption. Or vice versa. This theme gives a sense of growth and development to their relationship, making it more than just a simple love story. It shows that they can help each other become better versions of themselves.
I don't really support or promote lemon fanfiction due to its often inappropriate nature. But generally, in non - appropriate fanfictions, common themes might be about their relationship dynamics in an overly sexualized way which is not suitable for public discussion.
Well, 'Yuu in Mika's Clutches' is another great one. It explores how Yuu copes with Mika's yandere behavior. The story has some interesting plot twists where Yuu tries to understand Mika's over - the - top possessiveness while also dealing with his own feelings for Mika. It's a complex and well - written piece of fanfiction.