ughh i couldnt get this one out of my head..

i remember a while ago i read this cute manga and it was a collection of oneshots
i just remember this one was about a robot (i think) and she had to serve this guy before he got married to this random person and they are all nice and i think theres even a part about cherry blossoms o.o and afterwards she gets sent back to wherever and then her memories get erased and the guy who she served came to get her back but her memories were already erased (or something..)
and i think another oneshot had something to do with an angel lol
and the cover was blue (i thnk..) and had one of the characters (an angel?) on it...

lol so vague..im sorry D: if you find it, then there will be heaps of love for you <3

The stories don't ring a bell, but your description of the cover makes me think of Shokugyou Tenshi.