Dejivaisu ga Yami ni Somaru Toki

In a dream, Ken recalls entering the Digital World for the first time and becoming resentful towards his older brother, Sam. When Sam dies, Ken receives an e-mail which leads to him becoming the Digimon Emperor. After waking up, Ken returns to the Digital World and ends up in Primary Village. After promising to redeem himself, he is reunited with Wormmon in his infant form, Leafmon.