Currently reading #WorldsEndHarem and while it somehow manages to not be literally the worst #manga ever written, I don't think anyone can reasonably expect it to be good.
The premise, of course, is the dumb one you had as a 11 year old (if you were a male that liked chicks): so like, what if there were almost no other guys on earth?
Ahh, but they put a twist on it: he's in love with some chick from before he went in cryogenic sleep. Astounding stuff.