The prodigy of Seigaku, Fuji Shusuke, was admitted to Tokyo University under his sister's nagging and became a first-year freshman in the literature department. She met Yumiko's boyfriend Tezuka Kunimitsu, Tezuka's best friend Keigo and Yumiko Fuji's other suitor Ninzu Yushi. Atobe and Ninzu were interested in Shusuke at the same time, but one was joking and the other seemed to be sincere, leaving Fuji at a loss.
The story within the story is that ten years ago, when Fuji Shusuke's father, Fuji Kazuhiko, was developing a new drug when he took office as the chairman of the company, the chief researcher, Misako Shinozu, lost her life at the age of 23 due to side effects from the drug she personally tested and failed to save her. The real cause of death cannot be determined. Misako Ninzu is the cousin of Yushi Ninzu. After her cousin died, the young Ninzu was determined to investigate the truth of the matter. She gave up her dream of becoming a violinist and studied medicine instead, inheriting the family business.
Ninzu Yushi just met Yumiko Fuji when he was in college. An unexpected visit from his father reminded Ninzu of a middle-aged man holding a lily at Misako's funeral. Ten years later, when he met an acquaintance, Ninzu wanted to get close to Yumiko. He intuitively felt that the man was not just a company director, but should be related to his sister's death.
However, Yumiko's focus on Tezuka made it difficult for Ninzu to succeed. The appearance of Fuji Shusuke makes Ninzu happy and has a new breakthrough point. However, he did not expect that Atobe, who is an acquaintance of his own family, discovered a new toy and became interested in Shusuke. Ninzu could not tell Atobe bluntly that he should give up, so he had to get involved in this chaotic relationship vortex, regardless of his true intentions. Tezuka's feelings make things more complicated...