Gen Returns to Solve Bloodthirsty Vampire School Mystery

Gen returns to Japan from America, greeted warmly by his friends who missed him dearly. Despite undergoing extensive treatment, his health remains unchanged. Meanwhile, strange events plague the school as students faint from blood loss, and rumors of vampires emerge. Determined to uncover the truth, Gen and his allies embark on a mission to solve the mysterious occurrences and protect their peers from the lurking danger.