Raku reconnects with another childhood friend-Yui Kanakura. Back in the day, Yui was like an older sister to Raku, but now she's the head of a Chinese mafia syndicate! While in Japan, she's Raku's new homeroom teacher, and she'll be living together with him. Perhaps she can help Raku remember his past with Chitoge, Onodera and Marika... For teen audiences.