Hi there!
I am so sorry for the very late response. It's been a long time since I logged into Itch.io. Then again, I have looked through your website, and understood that you could use School Rush as a basis for Albert and Camille’s Little Lille Adventure.
I am honored that you have chosen School Rush to be a template for one of your your upcoming games.
If you wish to use School Rush as basis for Little Lille Adventure, feel free to do so. However, I hope to be given a mention for School Rush, but the biggest acknowledgement should go to Kadokawa Corporation and Yoji Ojima because they provided the RPG Maker MV software that I used to make the game.
Thank you.