Eijun and Haruichi are kidnapped while on vacation. Waking up, they find themselves in a hotel, but that is the only part that is simple about the next ten days. Choices they must make become their only option if they want to leave alive. The tasks seem simple at first, but can Eijun get Haruichi home without their friendship shattering to dust?

Eijun and Haruichi go on vacation with their retired and former senpai. Thinking about their futures, Captain Sawamura and Vice-Captain Kominato boarded a bus only to find themselves waking up in a hotel room hours later. At first they thought it was just a cruel prank, but quickly discovered that they were now a part of a study group for a minimum of 10 days.

Eijun deeply regrets the choices of his life that have lead up to his final summer. As he cries alone, Haruichi catches him off guard and tells him that he never regretted going to Seidou, just the events that transpired. As he cried his heart out, the world opens up and they fall into the past.