My Girlfriend Can Go Back

On December 1st, two of the school's top beauties came up to him and begged him to lend a helping hand to save their futures. They said, I went back from the future, I will be killed by a serial killer, please save me. Ever since, a somewhat suspenseful and thrilling love story unfolds... Islands, psychics, weird beliefs, super powers, six villages, secrets in the deep sea, serial murders, sacrifices, immortality... He didn't understand why they started fighting among themselves after he rescued them.