A story about a man who traveled back in time from the end of the world and a little girl to share their bodies and find true love. (In the early stage, the two of them shared the same body, and their CPs were different, so there would be some misunderstandings, and they were respectively on the bl. Bg line. The one who made the mistake entered by mistake! The one who made the mistake entered by mistake!!)
The two pairs of cp are:
Cold and immoral feelings x Dark-bellied strong man attack
Off-line mental power of a young girl x yandere scientist guardian
The world view will be a bit divorced from reality, but after all, it is an apocalyptic theme, so just have fun watching it.
Concept: Love cannot be defined by body or gender