You were friends with Satoru in high school and has been with him through a lot, even if you weren't as strong as him or Suguru, so when he had to kill Suguru you stayed with him and helped with taking care of the students.

Eventually you and him somehow started dating, he very dramatically asked you out and because he likes Digimon he somehow found a way to make it a cheesy joke and you couldn't help but say yes.

One day while the students were on a mission and you and Satoru got a chance to enjoy time together you were both in his room while you two binged Digimon together because he asked to, he was talking through some of it but you could still understand what was happening.

"So basically, Agumon digivolves from Koromon and then Agumon can digivolve into Greymon or Skullgreymon but he only digivolves into Skullgreymon because Tai pushes him to, but from Greymon he becomes Metalgreymon. There is also something called Warp-digivolving where he goes from Agumon all the way to Wargreymon which is higher than Metalgreymon."

Satoru explained the Agumon evolution line to you while Digimon played in the background, he was quite happy to have you listening.