The ending of 'Koe no Katachi' was a bit bittersweet but also provided a sense of closure. The main characters found some sort of resolution and growth.
One interesting concept could be exploring the characters' backstories more in - depth. For example, delving into Shoko's experiences before meeting Ishida in a fanfiction. It can add new layers to her character.
First, know the original story well. Understand the personalities of the characters like Ishida's journey from a bully to a repentant person and Shoko's strength in the face of adversity. Then, come up with a unique plot. It could be something as simple as a day in the life of the characters that wasn't shown in the original but still fits the overall tone.
No, not all of the manga on Crunchyroll is free. They have a mix of free and premium content. The free part might have limited chapters or series, while subscribing gives you access to a wider range.
Some manga can be found on Crunchyroll. However, it's not a comprehensive manga library. You might have better luck with dedicated manga apps or websites for a wider range of choices.
There are a few free manga options on Crunchyroll. But keep in mind that the majority of the extensive collection usually comes with a cost or subscription.