An alien landlord moves onto your roof to turn the world gay, one junior high girl at a time. The premise is absurd enough that the comedy doesn't need to explain itself, it just commits. This OVA knows exactly what it is: a 20-minute joke that doesn't overstay its welcome.
Naoko-san arrives on Earth with a singular mission: turn the entire planet into a utopia of pure yuri love. There's just one problem. She's chosen to base her intergalactic operation on the roof of Misuzu's house, and the junior high student below has zero interest in becoming part of an alien's romantic conquest scheme. What unfolds is a collision between Naoko-san's relentless optimism about spreading girl-on-girl affection across humanity and Misuzu's exhausted attempts to live a normal life. The alien won't quit pestering her, constantly cooking up bizarre plans to convert Earth's population while Misuzu just wants to get through her school day without supernatural interference. This comedy OVA embraces its absurdity without apology. The humor comes from watching an earnest extraterrestrial push her questionable agenda against a reluctant teenage girl who'd rather be left alone. If you want something short, weird, and willing to be completely silly about its premise, this delivers exactly that.