In a story set in the past, Himura Yuu was a hardworking student at Otowa Academy who focused solely on maintaining his top academic position. One day, he met Amamiya Yuuko, a mysterious girl who recognized him despite their distant childhood memories being left forgotten. This encounter forced Yuu to confront the regrets and sorrows of their shared pasts and presents.
In the present, Kuze Shuuichi may appear as a womanizer, but upon closer inspection, he is a man who prefers solitude. Hayama Mizuki, however, is determined not to let him be, especially after hearing his violin performance. As she tries to get closer to him, Kuze pushes her away, adding an undercurrent of impending tragedy to their budding relationship.