A possible plot could involve the two of them trying to keep the pregnancy a secret from their enemies. They know that if their foes find out, they might target Tohka and the baby. So they have to be extra careful and create a whole elaborate plan to hide the fact that she's pregnant while still going about their normal lives and duties.
The AST (Anti - Spirit Team) could be antagonists if they misunderstand the situation. They might think that the unborn child could be a new threat and try to stop Tohka from having the baby. Their lack of understanding of the spirits' true nature could drive them to take actions against Shido and Tohka.
One interesting plot point could be how they handle family reactions. Shido's family might be a bit surprised at first but then very supportive. However, the spirits might have different reactions. Some could be happy for Tohka, while others might be jealous or worried about the implications for the spirit - human relationship. Another plot point could be their honeymoon. Where would they go? Maybe they would go to a spirit - realm - like place that Tohka wants to show Shido, which could lead to new adventures.
One idea could be a crossover where Naruto's world is invaded by spirits and Tohka comes to help. Naruto could be intrigued by Tohka's powers and they team up to fight the new threat.
You can try searching on fanfiction websites like FanFiction.net or Archive of Our Own. These platforms often have a wide variety of fanfictions, including those related to Date a Live. Just use the search bar and type in 'Date a Live Shido and Tohka' to see if any lemon - themed ones pop up. However, make sure to check the site's rules regarding the content you're looking for as some sites may have restrictions on certain types of fanfictions.
One possible fanfiction could be where Shido finally confesses his true feelings to Tohka in a very romantic setting. They could be in a beautiful garden filled with the spirits' favorite flowers. Shido gets down on one knee and asks Tohka to marry him. Tohka, overcome with joy, says yes. Then the story could follow their wedding preparations, with all their friends, both human and spirit, helping out. They might have a traditional Japanese - style wedding with Tohka wearing a beautiful white kimono.
The popularity of Date a Live Shido and Tohka lemon fanfiction could be due to the strong relationship between the two characters in the original series. Fans are often intrigued by the potential romantic and more intimate interactions between them. The 'lemon' aspect adds a sense of taboo and excitement that some fans enjoy exploring in a fictional context.
One idea could be exploring how Yugi's friends react to the news. Some might be shocked, while others could be extremely supportive. Another could be the challenges Yugi faces during the pregnancy, like dealing with morning sickness and hormonal changes.
One idea could be that Lucy's pregnancy is unexpected and she has to deal with the reactions of her friends and family. Some might be overjoyed while others are worried. Another could be a story where the father of the baby is a mystery and Lucy goes on a journey to find out who it is. Maybe she discovers some secrets about her past relationships along the way.
One idea could be exploring how the other Transformers react to Megatron in this unexpected state. Maybe some are shocked, while others see it as a chance for a new beginning in the ongoing conflict.
One plot idea could be how Morrigan copes with the physical and emotional changes during pregnancy while still having to deal with her usual duties or challenges in the story world. Maybe she has to hide her pregnancy from certain characters for some reason.