This is after The Emoji Movie and in between the Appmons season. This will be the story of what happened to Gene and his friends after an unknown event How Gene and his friends were in other world and changed into Appmons that no one heard until now and who brought them there in the first place as well they help Haru, Gatchmon and many new friends to defeat Leviathan.
When Haru struggles to deal with the aftermath of Akuma stalking him, Rei is there with him every step of the way. HaruRei. Post-Breathless.
Eight years after the defeat of Leviathan, Mio Oozora escapes prison to hide in the Deep Web, stumbling upon a crystal box that can finally destroy the Applidrivers both mentally and physically. Will she succeed or will they be able to defeat their demons and rise up stronger than ever?
Rei has to learn to let Hajime grow, and Haru helps him.
When Rei is confronted once more by his childhood fears, Haru is there to remind him that he will never let him hurt again. Haru/Rei. Hurt/Comfort. Haru and Rei are both 21 in this.