The Umino siblings, who were left orphaned, face an intimidating situation when the Yakuza comes to their door. The eldest sibling has vanished after being in debt, causing Miyuki to panic for her brother's safety. Consequently, she decides to take on the responsibility of the loan; however, the Yakuza demands that she becomes a prostitute, hindering Miyuki's dream of becoming a tennis champion. Miyuki once showed great potential in tennis, but after her parent's death, she faced many challenges that made it nearly impossible to achieve her goals due to a lack of support from friends and others who sought to destroy her life.
