Shinitagari na Shoujo no Jisatsu wo Jama Shite, Asobi ni Tsureteiku Hanashi.

“Jun Aiba, will you give me your life?”. On the last Christmas of his high school life, Jun Aiba, who is having a hard time living, makes a deal with a woman who calls herself the God of Death. In exchange for his life span, Aiba obtains a watch that can rewind time, and uses the power of the watch