Daimon unexpectedly met Agumon, and the two fought as soon as they met. After Agumon was defeated, Daimon called him big brother, but the Digital Special Search Team (DATS) did not allow Digimon that were not managed by its members to remain in this world, and they had to be sent back to the Digital World. Then Yushima told Daimon that if he joined DATS, he could fight against the powerful enemies in the Digital World. Daimon therefore joined DATS and formed a team with Shuno and Toma to solve digital incidents together. Toma found that the increase in the frequency of digital incidents in Japan was not accidental, so he asked for leave to return to Europe to investigate and found that the root cause came from the seven deadly sins of humans. The incident of Biyomon made Daimon and his friends know that the mastermind behind it was the Ultimate Digimon, Mercurymon, and therefore decided to leave for the Digital World. In the Digital World, they met a human child, Ikuto, who called himself a Digimon and had a grudge against humans. After going through hardships, he met with old man Yushima and met Mercurymon. Mercurymon accused humans of not abiding by the agreement, seriously disrupting the order of the digital world, and cruelly killing Digimon. However, Yushima repeatedly emphasized that humans did nothing. In the end, the negotiations broke down. Yushima tried to create chaos while sending Dai and his group back to the human world, but he stayed in the digital world. After returning to the human world, everyone decided to meet Ikuto's parents. After meeting Ikuto's parents, Ikuto refused to admit his human identity. Under Dai's guidance, he was ready to integrate into this family and hoped to return to the digital world and say goodbye to Mercurymon. However, what awaited them was the death of Mercurymon, and the one who killed it was Kurata, who had traveled to the digital world with Dai's father, Ikuto's parents, Yushima, and Satsuma. In the end, Daimon Dai was the only one in DATS who stayed in the digital world. @yakutv.cc