On a summer day, Okita Yamamto, a current host club host and former biker gang member, received a surprise visit from a fifth grade boy named Susumu. The boy claimed that Yamamto was his father. Worried about being a negative influence on his son, Yamamto took on a job as a daytime delivery man. However, being a father proved to be more challenging than expected as Yamamto struggled to be a positive role model for his son.