So, I'm taking this as Saigado switched up the roles from the previous Jimiko Diaries and made the (initial) uninterested party a woman instead of that guy from the previous works. It's not like he didn't beat that dude's sex life into the ground.
It was Jimiko Catalogue with the guy collecting pictures and reminiscing, Jimiko Diary are all stand alone stories from what i can tell But youre right this one seems to have a plain guy instead