Astro Note

Both male characters are average guys. Both female characters are from another world. But they both fall in love. 

Absurd show with lots of comedy, sci-fi elements, references to classic shows, and lovable characters. 

Very similar setting and characters, without the alien stuff.  

The concept of an alien girl coming to earth and learning new things, meeting new people and living with the future main love interest, while a serious story in the shadows unveil itself over each episode to eventually fight for the ones who matter. Episode 1 itself has the favorable similarities from the get go. 

The main male protagonists have the same haircut (?) Absurd and romantic plot with positive vibes and funny. Very traditional style and it's kinda obvious that we'll have a happy ending. 

Two romcoms set mainly in an apartment with female landlady MCs that has another side to them that meets the eyes at first glance. The apartments in both shows inhabit a variety of eccentric characters whilst the male MCs gradually grow fond of the inhabitants in everyday activities as well as getting closer to the female MCs. 

Both anime are about eccentric people living in a boarding house type of environment where sharing is caring and a normal guy pursuing romance against all odds even if his particular love interest is way out of his league. What is more, the overall feel and visual aesthetic are also very similar due to the pastel colored tones used for backgrounds which further add to the relaxing slice of life aspects of each show.