Swing the sword at the future female devil

With the college entrance examination approaching, Duan Huaige unexpectedly discovered that he seemed to have a system from the future:
[At the end of the Spiritual Resurgence Era, the ruthless and murderous female demon Jiang Xiyu committed heinous crimes. She invited countless fellow Taoists to come and sit with her under the banner of the Human Emperor. Faced with such a demon, we righteous people must kill her!]
[Although your cultivation is not high, you should still have the courage to draw your sword against the strong! Declare war on Jiang Xiyu head-on and defend the last vestige of righteousness left in the world! Reward: Introduction to the Mountain and River Dao;]
Duan Huaige:?
The female devil you are talking about is my childhood sweetheart Xiao Jiang who fought with me to the death for sausages and could eat octopus balls until she turned herself into a chipmunk?
Needless to say, it is our duty to defend the glory of righteousness!
Duan Huaige was comforting himself while fleecing the future villain with peace of mind... However, he gradually discovered that the subsequent tasks seemed to be getting more and more outrageous?
[After a life-and-death battle, the wicked Qingmei female devil and the pure and righteous Bai Yueguang Sword Immortal are seriously injured and dying, but you only have one spiritual fluid that can save them.]
As a modern person who has studied pharmacology and biology, you know that oral administration isn't the fastest way to absorb medication. To have the best of both worlds, you'll use the most scientific method to achieve a perfect ending!
Duan Huaige:?
The absorption method you mentioned, could it be...
This book is also known as: "The More Scared They Are, the More It Shows That I'm Right as an Immortal Cultivator" and "What's the Point of Cultivating Immortality Without a Girlfriend?" It is a daily love story.

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