After you came back from a mission, you saw Geto laying on the couch reading a book. You were too exhausted to go to you bedroom so you walked over to the couch where Geto was and buried your head in his chest like his chest was a pillow

Backstory about the mission Gojo went on: One of Gojo students were having trouble fighting the cursed spirts so one of them called Gojo for help. And Gojo went on the way for their help