Yi Kong Zhan Ge

The girl warrior Fania meets a young man with amnesia named "Tutor", and the two embark on a journey together, gradually revealing the secret of the enemy - "Alien". At the same time, it is also discovered that "a certain mysterious force" hides behind it and wants to control the life of the girl warrior "Slude". They decided to rise up and purify the land...

(Source: Bilibili, translated)