If you are looking for helpful blog posts on , you should first identify whether you mean the start of the Kyoto Goodwill Event (Season 1) or the Shibuya Incident (Season 2), as both have distinct tones and major plot points.
: Wooderon provides a great breakdown of the excitement surrounding Itadori’s reunion and the build-up to the interschool tournament.
: Itadori makes his "surprise" return to his classmates (which doesn't go exactly as Gojo planned), and we meet new characters like the Kyoto principal Gakuganji and students like Mai Zenin and Aoi Todo.
: Anime News Network and Star Crossed Anime provide in-depth reviews that discuss the episode's animation quality and the strategic nature of the domain battles.
Season 1, Episode 14: "Kyoto Sister School Exchange Event - Group Battle 0"