Haru Miyako, a 16-year-old honor student at Otogi All-Girls High School, merges academic discipline with a privately held fascination for excess, her polished exterior concealing a metaphorical "dark side" simmering with restless desire. Hailing from a privileged background, she channels her intellectual intensity into chronicling culinary adventures on a ramen-focused blog, relentlessly pursuing bold flavors like the enigmatic "ramen on the other side of spicy" at eateries such as Ramen Russia. During one expedition, she unexpectedly crosses paths with Nasa and Tsukasa, sharing their table while subtly studying their exchange—though Tsukasa’s quirks briefly fracture her composed demeanor. Amid her school’s varied student body, Haru occupies a space defined more by perceptive silence than overt participation, her interactions often fleeting yet sharp with unspoken curiosity.