After the heroine loses her memory, it is best to have a contrasting personality with before she lost her memory. For example, she was strong and cold before the memory loss, but soft and dependent after the memory loss. This way, the change in the male protagonist's attitude will be more natural. The male protagonist was tit-for-tat with the heroine before the amnesia. After the amnesia, in the process of "acting" as a partner, he gradually discovers another side of the heroine, from rejection to excitement.
