This one gets pretty dark.

Basically a girl finds this little squishy alien who promises to bring happiness to her. This thing is learning about the human race and they are...not what he expected but he keeps trying. Time traveling, death, suicide, abuse, and much more. This is def for mature audience only, and while I did enjoy it, I would say it can be a bit jarring and hard to follow if don't pay attention. A 3.5 out of 5.