Sankagetsu Mae ni Wakareta Senpai Kouhai no Hanashi

Usami Nao and Doubayashi Kazuma who had a secret relationship with each other. The two broke up due to a slight quarrel, but after three months, Doubayashi still can't give up his feelings. Doubayashi makes an effort to regain himself by reflecting on his past mistakes and changing himself. That feeling would be transmitted to Usami for a while, but as a result of Doubayashi's persistent attack, the distance between the two began to gradually shrink. However, it seems that Yuuki, a refreshingly handsome guy in the company, is also aiming for Usami...! ?