Its spring, and Naoya is now a second-year college student. As usual, hes working as Professor Takatsukis assistant. One day, Takatsuki receives a request from a woman working in an architectural firm. Whats the truth behind the creepy things happening in the office related to the number four? In June, a weekly magazine publishes an article about the appearance of a mermaid, causing quite the stir. The fervor about mermaids heats up even in Takatsukis lecture. On such a day, a dapper British gentleman wanders onto campus-and hes Takatsukis uncle?! Unexpectedly, the man tells Naoya about Takatskis sorrowful past. Then on a day off, they go investigate the area where the mermaid appeared. There, they meet a boy who tells them that his mother turned into a mermaid. nGHOSTS OF THE PAST... Spring has come for Naoya, now in his second year of college. To Professor Takatsukis delight, Naoya signs on for another year as his assistant, and it doesnt take long for the requests to start coming in! Strange things keep happening in an architectural office, and every occurrence seems to feature the number four. A weekly magazine puts out an article about a real-life mermaid sighting! But arguably the biggest mystery of all is the appearance of a dapper British gentleman on campus... Wait, hes Takatsukis uncle?! nGHOSTS OF THE PAST...Spring has come for Naoya, now in his second year of college. To Professor Takatsukis delight, Naoya signs on for another year as his assistant, and it doesnt take long for the requests to start coming in! Strange things keep happening in an architectural office, and every occurrence seems to feature the number four. A weekly magazine puts out an article about a real-life mermaid sighting! But arguably the biggest mystery of all is the appearance of a dapper British gentleman on campus... Wait, hes Takatsukis uncle?!