Nothing Had Changed

its been 150 years since that accident happened, an unknown virus has been released to the world, and it seem to have came back 150 years later this time someone released it on purpose, it was a boy's sister, she want to get revenge for someone, knowing the fact that her and her brother are immortal, she recreated the virus and left him a message, now its his task to stop it but with the help of someone who he will helplessly fall in love with.

This is my first time writing a book and of course I'm writing for the fun. please do know that updates will take long as I'm extremely lazy :)
--->!The characters are not mine they are from a game called Genshin Impact. the plot it's self was created my me.