Yuusuke Kinoshita enters the narrative as the son of Yasuo Kinoshita, owner of the Pia Carrot restaurant chain. Compelled by his father due to poor academic performance, he reluctantly starts working at the family business during summer, specifically assigned to the "1st" location. He initially perceives this work as punishment but gradually becomes more invested through his interactions with the staff.

By the events of "Welcome to Pia Carrot 2," set four years later, Yuusuke has advanced to become chief at the "2nd" restaurant. In this role, he oversees operations and mentors new employees, including protagonist Kouji Maeda. This leadership position marks his evolution from a reluctant part-timer to a responsible manager within the family enterprise.

His family remains central to his story. His younger sister, Rumi Kinoshita, occasionally appears at the restaurants, and her interactions with staff can influence workplace dynamics, sometimes contributing to misunderstandings between Kouji and others.

In later installments like "Pia Carrot 2.2," Yuusuke transitions to a temporary chief position at the "3rd" location, demonstrating his mobility and trusted status within the growing chain. His journey continues in "Welcome to Pia Carrot 3," where he serves as manager of the "1st" location and is married to Satomi Morihara, a former colleague from the original game. This married life and sustained managerial role cement his long-term commitment to both the family business and the personal relationships forged earlier in the series.