The heroine who is indifferent to the outside but gentle inside vs. The little puppy boy who is only sweet to the heroine
Strong and strong love each other Shuangjie
The male and female protagonists were both adults when the relationship was established and were not related by blood.
The first world: the end of the world (the male protagonist with supernatural powers who volunteered to become an experimental subject)
Rest of the world: tentatively
The heroine has memory, but the hero does not, but he has the instinct to get close to the heroine
Intention: sweet love