A year ago, Saeko remarried a man with children and became the mother of a college student named Manabu. One day, "Mom, I've decided to join an event circle," Manabu said with a smile to Saeko, who hoped that her son's college life would be fulfilling... But several days later, Manabu brought his club members home. They were scheming something nefarious for the summer event. Then they came up with the idea of making Saeko drink their "original drink"...
