On the other hand, Sasuke could be very stoic about it on the surface but internally be in turmoil. He might start to analyze his own actions and whether he had missed any signs from Sakura. He could also be the type to immediately start thinking of ways to win Sakura back if he realizes he can't stand the thought of her with someone else.
One possible scenario in a fanfiction could be that their first time is after a long-awaited reunion. Sasuke, having finally returned to the village and to Sakura, realizes how much he has missed her. They might share a quiet moment, looking into each other's eyes, and then slowly come closer. Their first kiss could be the start of this special moment, filled with years of pent - up emotions.
One possible fanfic could be about Sakura and Sasuke's first mission together. They might start off a bit awkwardly as they have a complex relationship. Sakura is still trying to prove herself to Sasuke, and Sasuke is dealing with his own inner demons. As the mission progresses, they start to rely on each other more and more, which could be seen as a 'first time' in terms of really trusting and depending on one another.
In a more complex scenario, Sasuke seeing Sakura kiss could be a turning point in their relationship within the fanfic's universe. If it's out of the blue for him, he could become angry or confused. He might question Sakura's loyalty or his own assumptions about their bond. It could also lead to him distancing himself from her, or conversely, finally realizing his true feelings and trying to win her back.
In a typical fanfiction scene, Snape is standing in the Great Hall during the Sorting Ceremony. The first - years are being called up one by one. When Harry's name is announced, Snape's eyes immediately dart towards him. His face hardens, and his grip on his wand tightens involuntarily. The air around him seems to grow colder as he stares at Harry with an intensity that makes some of the nearby students shift uncomfortably.
The plot could involve their first time facing a really tough enemy together. They are forced to use all their skills and knowledge. In the heat of the battle, they realize how much they complement each other. For example, Sakura can heal Sasuke when he gets injured, and Sasuke can protect Sakura from the enemy's most powerful attacks. This 'first time' of relying on each other in such a high - stakes situation could be the focus of the fanfic.
Maybe Sasuke teaches him the Chidori in a moment of camaraderie. And for the Rasengan, it could be an older and wiser Naruto from the future who travels back in time to teach his younger self.
He could also be shocked into momentary silence. His first sight of Harry might bring back a flood of memories, both good and bad. Maybe he freezes for a second, his mind racing with thoughts of Lily, Harry's mother, and how things could have been different. Then he quickly composes himself and tries to hide his inner turmoil behind his usual stern facade.
One possible 'sakura sasuke first time' fanfic could be about their first mission together. They might face a difficult enemy and have to rely on each other in new ways. Sakura could show off her medical skills and Sasuke his combat prowess, and through this experience, they start to see each other in a different light.