User Recommendations for Ascendance of a Bookworm

Both protagonist have an obsession either over books or pharmaceutical studies. They reincarnate into a fantasy world as children of a rich / poor family with bonus magical powers and use the knowledge from their previous life to advance in their world.

Both have an Isekai theme based on working classe adult reincarnating in a fantsay but medieval era world as a child form. Both then proceed to bring their knowledge from their world to this new one while trying to hide their identity as reincarnation.

Both features MC who died and took over a child's body from another world. With their knowledge from their original world, they use that knowledge to improve the lives of others surrounding them. Slow but steadily enhances the technology in their new world

Both isekais, where people get to their new' underdeveloped world' without first seeing a god who explains it all, so they figure out things as they go They both inhabit the body of a child, and they both want to make their new world a better place. Both of the stories are legit about making things better and the steps they take and the hurdles they overcome, neither has sexual scenes, overnakedness and your typical fanservice. Both of these anime makes you want to root for the main character.