You can try searching on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just type in'rei and takashi kiss' in the search bar, and it should show relevant stories if there are any.
Well, first, you could start by using specific search engines for fanfiction. Some of the more popular ones are dedicated to different fandoms. Also, check out relevant forums or communities where fans might share or recommend such fanfictions. Maybe there are some Tumblr blogs or Reddit threads that focus on this particular pairing and could lead you to the desired fanfiction about their kiss.
You can try searching on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you might be able to find some great takashi x rei ones there. Just use the search function and type in 'takashi x rei' to see the available stories.
Archive of Our Own (AO3) is also a great source. It has a well - organized tagging system. So, you can search for the characters' names and also tags related to kissing or romance. There are often high - quality fanfictions there that might include the takashi kissing saeko scenario.
Archive of Our Own is a great place to start. It has a large collection of fanfics, and you can easily search for 'takashi x rei' there.
Some dedicated anime fanfiction communities could also be a good place to look. These communities often have users sharing their own works. You can join forums related to the anime that these characters are from and ask around for Takashi x Rei x Saeko fanfiction.
One common theme is the development of their relationship. It could be about how they first meet and start to have feelings for each other. Another theme might be adventure. They could be on a journey together and their relationship deepens during the adventure.
One common theme is friendship. Their bond might be explored as they face various challenges together.
One possible storyline could be that Takashi and Rei are in a post - apocalyptic world. They find a safe haven and decide to start a family. The pregnancy could bring new challenges and joys. For example, they might struggle to find proper medical care for Rei during the pregnancy. But at the same time, they could be excited about bringing new life into their difficult world.
There are some really great ones. However, the availability might depend on the specific fandom community. You could try joining relevant forums or groups dedicated to the series they are from. There, fans often share and discuss their favorite fanfictions, including those with takashi kissing saeko.
Perhaps a plot where Takashi and Rei get separated from the rest of the group. They have to find their way back while also dealing with their own feelings for each other. Along the way, they discover new things about themselves and their relationship, like Takashi learning more about Rei's past and why she's so strong - willed.