Complex sentence: He becomes a close friend to Daisuke and it appears that Daisuke is the trigger for Satoshi's curse, Krad, to appear.Probably because of his crush on Daisuke, which is evident throughout the series.
Split into simpler sentences: He becomes a close friend to Daisuke and it appears that Daisuke is the trigger for Satoshi's curse, Krad, to appear. Another possibility is that he has a crush on Daisuke, which is evident throughout the series.