The ending could also be open - ended. After the kiss, they are left in a state of confusion about their relationship. The fanfiction could end with them both looking at each other, not sure what the future holds but knowing that their relationship has changed forever.
One possible plot could be that after the kiss, they have to face the reactions of their friends. Some friends might be supportive while others are shocked. For example, Amu's friends could initially be a bit taken aback but then come to accept their relationship as they see how happy Amu and Ikuto are together.
One of the most heart - touching scenes could be when Ikuto and Amu finally share a kiss in a moment of great emotional intensity. It might be after they've overcome some major obstacle together, like facing a powerful enemy in the Shugo Chara world. Their kiss would be a symbol of their deep connection and the growth of their relationship from just friends or acquaintances to something more intimate and loving.
The kiss could also cause some tension within the group. Maybe some characters think Ikuto is not good enough for Amu or vice versa. This could lead to arguments or misunderstandings among the characters. However, it could also bring the group closer together in the long run if they work through these issues. They could learn more about each other's feelings and become more understanding.
A great plot idea could be that Amu and Ikuto are chosen to participate in a special Shugo Chara tournament. They must compete against other pairs from different regions. Along the way, they face various challenges that test not only their physical and magical abilities but also their relationship. As they progress, they start to realize their feelings for each other are growing stronger and this affects their performance in the tournament in both positive and negative ways.
In a Shugo Chara Amu x Tadase fanfic, it could be a story where they are paired up for a school project. At first, they struggle to work together because of their different personalities. But as they start to understand each other better, they realize they make a great team. Along the way, they also have some cute moments that show their growing affection for each other.
Their relationship could develop more quickly. For example, instead of the slow - burn in the original, they might admit their feelings for each other earlier. Maybe after a particularly dangerous encounter with a powerful enemy, they realize they can't bear to lose each other and confess right then.
It could be described as a gentle, hesitant kiss, like two young souls tentatively exploring their feelings for the first time. For example, 'Their lips met softly, as if afraid of breaking the fragile moment.'
I'm not sure of a specific one off - hand. But you can try searching on fanfiction websites like FanFiction.net or Archive of Our Own. Just type in 'Shugo Chara Amu pregnant' in their search bars and you should be able to find some relevant stories.
One of the best elements is the build - up of their relationship. The way the author shows their growing feelings towards each other before the kiss makes it more exciting. Also, the description of the emotions during the kiss, like Ikuto's intensity and Amu's shyness, adds depth.
One common theme is friendship evolving into something more. Since Nagihiko and Amu have a connection in the original series, fanfictions often explore how their relationship deepens romantically.