I have NOT watched JJK. So this is not canon nor does it have anything that is included in canon. Some things will be from canon like Geto wanting to kill all non-sorcerers and blah blah. (NOT CANON) Geto and Gojo. Once inseparable best friends, now two halves of each other on opposite sides. Gojo can't help but still want Geto, but he knows it's wrong. Geto, however, will stop at nothing to have Gojo. (Image is from Google/ Zerochan)