Star Rail: Sister Jingliu, Let Me Protect You

This story has a slow pace.

Also, this book has only one heroine! One heroine! One heroine! The heroine is Jingliu.

Note: The protagonist isn't invincible. He's the type who grows stronger over time, so feel free to leave if that's not your thing!

Mo Beichen was brought back from the battlefield by Jingliu.

After bringing him back, Jingliu taught him swordsmanship, and he became her disciple alongside Jing Yuan.

As he trained, Jingliu discovered that he had an exceptional talent for learning. He could pick up the sword techniques she taught him after just one or two lessons.

As time passed, Mo Beichen's swordsmanship grew stronger and stronger, until he had surpassed Jing Yuan.

Later, Jingliu realized Mo Beichen could take a serious beating, so she went out of her way to find him the long-lost body-tempering technique, the Imperial Gold Art!

From then on, Mo Beichen began his path to becoming a powerhouse.