Ukiyo [BL]

Han was just a normal person until a gang took the life of his significant other, Sai.

In despair, he was determined to make time travel possible in order to prevent Sai's death.

But as he successfully made a time travel device, he uncovers the secrets of the side he never knew Sai had.

Will he be able to save Sai in the future? or will he die in the process?