Synopsis: Didn't We Say We'd Live Together If We're Alone at Thirty?

I considered it merely a promise made while intoxicated: "If we both remain single by the time we turn 30, let’s cohabitate together." As her 30th birthday approached, a mysterious figure showed up at Tsukiko's doorstep in the middle of the night—it was Sora, the very person with whom she had made that pact. Not particularly luxurious, yet unexpectedly enjoyable—a journey of living together in their thirties♪