START-233 — Ayase Ten, A Foreign Financial Man Who Is Visiting His Hometown For The New Year Holidays, And His Sister Who Works As A Salesperson At A Local Mobile Phone Shop, Secretly Meet In The Bathroom While Their Parents Are In The Living Room.

They've been in love for eight years and in a relationship for seven. Since the older brother left home, they've been meeting every three months. But thinking about appearances and their future, the two of them make a promise not to see each other for the time being. They try to see if either of them can find someone else to love, but of course it's impossible for two people with crazy romantic interests. The brother and sister make a promise to live together in Tokyo.