The premise is absurd on its face: the government forces two teenagers to marry to fix Japan's birth rate problem. The comedy works because Ryo actually hates this. The romance builds not from the forced setup but from watching two people who wanted nothing to do with each other find reasons to stay. The short episodes keep the pacing tight enough that the slower early stretches don't kill momentum. By the time the emotional beats land, you're already invested in whether these two actually want to be together, not whether the government mandate works out.
Ryo and his younger sister Akane have carved out a quiet life together since losing their parents, but the Japanese government has other plans. Worried about a falling birth rate, the state runs a secret trial program that pairs young people for marriage, and a supercomputer has picked Ryo as the ideal match for a girl named Shizuka. Ryo finds himself drafted into this scheme whether he likes it or not. His new fiancée crashes into his home late one night, followed by around thirty men in black suits who are there to make sure the match succeeds. Shizuka is thrilled with the arrangement and eagerly takes on the duties of a wife despite Ryo's protests, while meddling friends and pushy bodyguards make things harder still. The result is a romantic comedy with slice of life and dramatic touches, built on the clash between a reluctant young man and an overeager bride who has no intention of leaving.