A detective story that evolves around two high school students, Kana Mizuhara, a curious girl who can't help looking after others, and her new classmate, Sou Toma, who graduated from an elite U.S. college at the age of 15. The two try to solve mysteries with a help of Kana's father who is an investigator..
Ezaki Yuichi and Akiba Rina meet in the hospital when Yuichi is suffering from a mild illness which can be cured, but Rina has problems with a heart condition that can only be treated with a potentially dangerous operation.
The new season begins with a special case that leads the duo to the Consulate-General of Japan in Hong Kong. It’s the first time for ‘Aibou’ to expand its setting to a foreign location since they went to London in the second season. Mizutani commented that it perfectly suits inspector Sugishita Ukyo, since Hong Kong used to be a British colony and Ukyo is interested in everything British. His new partner is called ‘Kai Toru’. He’s played by Narimiya Hiroki and is going to breath new life into the series. More details about him can be found here and here, but we will have to wait until the first episode to find out how they end up as partners.