Like an Evergreen | r. nanami

[Ryusui Nanami x OC]
Harukaze Hana has always been an extremely curious child. Growing up reading medical and botany books instead of manga, she loved all types of plants, but her favorites were the evergreen ones: Hana wanted to be just like them as she helped her friends and she didn't care about what could happen to her, just like the green leaves stayed regardless of the weather. So when a strange green light petrified all humanity, many years later she woke up in a strange cave near her friend Taiju, in a second "stone age" era.
With the awareness of being the second revived human, after her childhood friend/brother Senku, the handyman doctor of the Kingdom of Science promised to help him revive all humanity with all her might.
_
You can find this story on ao3 as well. This is a translation.