Thete are tho most of them i found are girl and boy romance but even so its worth readin (dunno if ur into that)
You can find similar mangas that have historical gender but as far i havent found any where someone died of old age, most of them get killed or end up in some accident. You can check some on my profile in my list OBSESSIONS or Want to read :*
died of old age but reincarnated back to the past though D:
http://www.mangago.zone/read-manga/volcanic_age/
thank you for the list
(▰˘◡˘▰)
are there any manga that has a "MC who died of old age then reincarnated in another life" setting?