Total Recommendations: 2
Both are pretty sci-fi like, and ultimately revolve around a love story. Both are pretty bizarre, strange and unusual. Although Luluco is much more of a wacky comedy, while Kaiba is much darker, but does have elements of humor as well.
They both have this sort of one-sided love thing going for them, both comedy, and they both give a sense of false hope when you think a romantic development is about to happen. Also the main focus is on a boy and a girl.