The most obvious difference between the manga and the anime is the scene placement. For most anime adaptations of an established manga series, the animators have a wealth of scenes at their disposal. So it is a common practice for them to rearrange the placement of certain scenes if it could help telling the story in a better way. The same thing happened with Keep Your Hands Off Eizouken.

This practice of scene rearrangement happens right at the very beginning of the anime, with the scene where young Asakusa spent her time exploring her housing complex and then falling in love with anime for the first time.

This opening scene for the anime was taken from chapter six of the manga. Since there are no other flashbacks for the rest of the volume and the first episode is mainly for introducing the characters, it makes sense to put the scene at the beginning of the anime. And of course, there are other instances like this happening throughout the anime from time to time.

Other than the aforementioned scene at the beginning, the first episode is a rather faithful adaptation of the first chapter. So how could an entire episode be based on one chapter alone while the whole first volume only translates into four episodes in total?

The answer is that the scenes are lengthened and intensified, particularly the last scene of the first episode where the girls enter Asakusa's fictional world. The scene where they work on the aircraft is lengthened considerably.

The original idea of the scene in the manga is simply Asakusa and Mizusaki working on their first concept art together while delving straight into the fantasy world. In the anime, however, that scene evolves into an intense aircraft chase sequence.

This practice of lengthening and intensifying often happens during their time in the imagined world, but it occasionally happens when the trio is in the real world as well.

As an anime that tells the story of amateur anime production, there are lots of animation concepts being explained by the characters. Not only that, we also often dive into the imaginative worlds as a way for the characters to brainstorm ideas. And those are the two things that the anime does way better than the manga.

When Mizusaki talks about animators using a fake sword to find out the best way to show the movements in the anime, it is easier to understand what she means when we can see the character actually moving, rather than simply looking at a small panel of a character holding a sword in the manga.

The same thing happens when they brainstorm ideas for the settings of their first anime. In the manga, all we see are panels where they talk about the setting selections, while in the anime, we get to see them actually moving and interacting with the imaginary environment while talking about the pros and cons of each setting. That makes it way easier to understand and more interesting to see as well.