Well, in addition to Otani and Risa, their baby could also be considered a main character in a sense. After all, the whole story revolves around the new addition to their family. The baby's presence affects their relationship, their daily lives, and the way they interact with the world around them. So, even though it's a new life and can't really act like a typical main character at first, it still has a major impact on the story.
Perhaps a plot where their baby has some unique trait or ability that surprises them. It could be something like the baby being extremely perceptive at a very young age, and they have to learn how to parent in this new situation. For example, the baby seems to understand their emotions and tries to comfort them when they're sad, which makes Otani and Risa reevaluate their own relationship and how they want to raise their child.
You can try fanfic websites like Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including otani x risa. Just search for the relevant tags and you should be able to find some great ones.
One great otani x risa fanfic could be 'Otani and Risa's Adventure'. It often features their unique relationship and the interesting dynamics between them. They might go on a journey where they face various challenges together and in the process, their bond deepens.
Rather than seeking lemon fanfiction which may not be suitable, you could start by exploring the official works related to Risa and Otani. This can give you a solid understanding of their characters and relationships. Then, if you still want to read fanfiction, look for the ones that focus on their growth, friendship, or love in a non - explicit way on well - known fanfic platforms.
Their relationship becomes more tender. Otani, who might have been a bit more carefree before, becomes more protective of Risa. He starts to take on more responsibilities around the house, like cooking healthy meals for her.
One common theme could be the exploration of their unspoken feelings. In many cases, Risa and Otani might have feelings that they are hesitant to express. Fanfiction can delve into how these feelings surface and how they deal with them. Another theme could be their cultural or social interactions within their relationship, like how they handle family or friends' reactions to their relationship, all while keeping it clean and family - friendly.
One could expect a scene where Otani and Risa are shopping for baby clothes together. They might be in a cute little store, holding up tiny outfits and laughing at how small they are. Another could be them decorating the nursery, with Otani struggling to put up the wallpaper while Risa gives him instructions. It would show their growing bond as they prepare for their new family member.
In the KTV scene of the movie Love Complex, Risa Koizumi and Atsushi Otani sang the song "One Piece Of Treasure" together. This song was sung by the Japanese singer Miki Matsuhara. The lyrics of the song described the love story between two people. It was a very famous song.