Genshin Impact: I Went to Study Abroad and Somehow Became a Liyue Bigwig?

[The protagonist is a native of Teyvat + Kuki Shinobu is the sole heroine + everyday life + a little sweetness + some original worldbuilding + set before the main story begins]

After stepping down as the former captain of a Sumeru desert mercenary group, Li Sheng returned to his village to teach. With the help of his friend Alhaitham, he went to Liyue to continue his studies and train with the Millelith.

In Liyue, Li Sheng met Kuki Shinobu, who was preparing to take the bar exam. Having started out as a mercenary, Li Sheng had decent social skills, but when it came to romance, he was completely clueless. This led to no shortage of embarrassing misunderstandings, and even made Kuki Shinobu imagine for a while that Li Sheng was in love with her.

Yet during his studies in Liyue, for one reason or another, Li Sheng gradually went from being a simple foreign student and new Millelith recruit to becoming the dean of Liyue's law academy and commander-in-chief of the Millelith, all without realizing it himself. Even the adepti of Liyue held him in high regard.

Kuki Shinobu: Li Sheng likes me, so why won't he confess?

Ningguang: What an interesting young man. He may seem a little slow, but his talent for business and governing is no less than mine. If possible, I must keep him in Liyue.

Keqing: If Li Sheng hadn't yielded to me, I might not be the Yuheng today.

Yelan: You mean Li Sheng? He may look dull, but he's impossible to read. Even when I put on all kinds of disguises, he sees right through me. I really want to find out what that boy is thinking.

Zhongli: Li Sheng's personality and way of doing things are rather peculiar. I see a shadow of the Scarlet King of old in him.

Alhaitham: Li Sheng, explain yourself. You went to Liyue to study abroad, and ended up becoming Liyue's