In Tokyo, police officer Mari Kouda and Chinese interpreter Ryo Arikino solve cases while bonding over meals from different cultures, forming an unexpected connection through their shared experiences.

Suzaku Kanade is the scion of the Suzaku Group who is a bilingual "straight A" student with good looks and great athletic abilities. He is deemed a "celebrity prince" with graceful manners. One day, through his father's introduction, Kanade meets "bad boy prince" Kyogoku Takato who is a charismatic figure among the bad boys in the downtown area.

Kanade and Takato who live in completely different worlds and have totally opposite personality start to compete for an "important thing".

However, Takato's little brother Kyogoku Ryu, student-union president prince Ayanokoji Aoi, dance prince Red - Tendo Koki, teacher prince Yuki Riichi, and beautician prince Sagasawa Haru also join the competition...

Welcome to Kowloon Walled City: a dystopian townscape where the people are brimming with nostalgia, and where the past, present, and future converge. Amid the hidden emotions and extraordinary daily lives of the men and women working in its confines, a tale of romance begins to unfold for real estate agent Reiko Kujirai―one that feels as familiar as Kowloon itself…

Ginbayashi Yoko is a top-class chef at a high-end Italian restaurant, but her life is turned upside down when the owner runs away with all the earnings, forcing the restaurant to close. With two children to support, she takes a job at a local men’s prison as a nutritionist, where her main duties involve planning monthly menus. Encouraged by the warden, she resolves to pursue rehabilitation through food, questioning whether people can truly change and what she herself can achieve. Thus begins her new challenge—aiming for “three-star prison cuisine.”