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, the other seemed to be sincere, and Tezuka's vague feelings made Shusuke at a loss. A series of incredible games and collisions entangled young hearts...
The story within the story is that ten years ago, Fuji Shusuke's father, Fuji Kazuhiko, was the chairman of a pharmaceutical company of the B&G Group before leaving Japan. During his tenure, when developing a new drug, the R&D personnel were too careless and an accident occurred during the test. An important researcher, Misako Shinozu, lost her life at the age of 23 due to side effects caused by personal testing of the drug and the rescue was ineffective. 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.
How does Renzu meet the Fuji family siblings again to open the door to the mystery of ten years ago? What roles do Tezuka and Atobe play? What kind of emotional entanglements will happen between them? Who will admit the truth in this game, and who will betray whom?