Rui turned 30 while still single. Give up on men and buy an apartment and live with a cat! The person working at the real estate agent who visited with enthusiasm was his friend Hitoshi, whom he met again for the first time in nine years! In fact, in the past, Rui made a promise to her, “If we’re both single until we’re 30, let’s get married.” I thought that Hitoshi had forgotten about it, but…!