A VERY sad yet romantic comedy
--> http://www.mangago.zone/read-manga/my_life_in_two_panels/
Omg!!!!! that's so short, bbbbut very thrillng XD
Thought it was a serious recommendation. hahahaha
Link please T.T
I don't know if you are looking for specifically ideas from manga or not but here are a couple, not all are completed, but they should give you a pretty good idea about plot progression...
God and Buddha sharing an apartment in modern Japan -
http://www.mangago.zone/read-manga/saint_oniisan/
A version of the life of Van Gogh, told from the perspective of his fictitious brother -
http://www.mangago.zone/read-manga/sayonara_sorcier/
Pharaoh in modern Japan is unburied and wakes up, gets a job -
http://www.mangago.zone/read-manga/fara_otto/
Similar to the movie groundhog day: each day, an office worker must save her irritating boss from death or have to live that day over again -
http://www.mangago.zone/read-manga/happy_if_you_died/
how bout this oneshot: http://www.mangago.zone/read-manga/ameiro_no_toge/
Im open for recommendations and ideas... i just really need it. Were going to make it a film. Thankyoouu