If you are playing any scene for the first time, you can not skip it. You are forced to watch all of them completely. Also, the first video where the online school is introduced will be not be able to be skipped.

There is the "skip-button" on the right buttom corner of your screen. All you need is just press your mouse ones anywhere, and all buttons will appear.

If you want to skip scenes "faster," you'll need to press the skip button, then click one time somewhere else on the screen so that the selections at the bottom right will disappear. Click anywhere one more time, and the buttons will appear again. Doing this method is the fastest way to move forwards with your progress. You can't spam the "skip" button infinitely, so you always need to hide and appear the button panel manually.

If you played a scene and have made some wrong choices, you can "move back" to the past scene or even an earlier chapter and change your decision. For example, if you gave one person too much "friendship," you can move back to some earlier episode/scene and be "not nice" to them. JUST IN CASE: wait for the "save symbol" (a plane) that shows up in the top right corner. This way, you can be sure that the decision is saved. Afterward, you can select a future episode and continue from there.

Warning! Some choices are very particular. You will see a "warning message" (If you can't reach it, try an earlier option.) and the scene-selection screen. So you'll need to search in the timeline where you can later play from there. For example, the scene within a class where you'll meet Nahnan and say one phrase which increases or decreases her relationship with you, or if you decide to tell Dr. Mi about how you "helped" or "hurt" Nahnan. After this decision, you can't jump into the final chapter. You'll need to find your latest starting point. You always will know if you are navigating your mouse on the episode picture where there would be the "play" button under the scene.

There are also some puzzle areas where you'll need to collect some items for a limited time. You can press the "skip" button in this scene so everything you've done will save. Saving will make sure you dont have to do it again. WARNING! For some different paths, you will not find anything to unlock additional scenes, so you NEED to wait 15 or even 30 minutes just for this scene to be saved to get a different scene. Sadly you can't skip ahead, and must wait it out.

7. This guide's creation is for people who want to get the "100% achievement" and save tons of hours doing so.

... and good luck!