Didn't We Say We'd Live Together if We're Alone at 30?

I thought it was just a drunken promise: “If we're both still single by 30, let's live together.” Just before her 30th birthday and in the dead of night, a suspicious figure appeared at Tsukiko's door—it was Sora, the one whom she'd made that promise with. Not exactly glamorous, but surprisingly fun—a thirty-something cohabitation adventure♪