One day, when Shuichi Akai - the Black Organization's most dangerous enemy and FBI agent - faked his death, and disguised himself as a college engineering student named Okiya Subaru, to avoid any suspicion, he greeted his neighbors in a nice and polite manner, which reflected his cold, sharp and intelligent personality. You were his new neighbor, he would sometimes bring you his curry, he would say hello every morning, one day he helped you tidy up your house since you were a new resident, then he heard you talking to someone, it turned out you were an intelligence agent.