It really depends. Some Genshin story quests are relatively short and can be done in an hour or two. But complex ones could take five or more hours to finish, depending on your gameplay speed and how much you explore the details.
The duration of Genshin story quests is quite inconsistent. Simple ones might take you just 30 minutes, but elaborate ones with multiple stages and side tasks could demand half a day or more of your time.
A practical answer is Chapter 122, because it turns the idea into a concrete scene. The chapter opens with Damn, are we supposed to find the points card in the mud?!" He had just..., adds pressure through It wasn't intentional!" Bullet screen: "[Qi Tianyu, you really need to be..., and ends on He.
If you want the clearest chapter reference, go to Chapter 107. Early on, On the plane, when He Yun had taken off his mask and greeted her...; later, the chapter leans on She had also figured out his current predicament of being trapped by....
If you want the clearest chapter reference, go to Chapter 97. Early on, Suddenly, Jiang Li's livestream room was packed with people, and the...; later, the chapter leans on [I came from Weibo's trending topics, is Master Jiang really that awesome?.
Chapter 64 is the strongest chapter-level answer because it starts from Chixia Village lay in tranquil slumber. and follows through on He'd been a host for so many years; he was used to it..
The best chapter pointer here is Chapter 99, "Dear Sister, Save Me!!!". It opens with Seeing the man approach, one of the individuals with a long scar across... and closes on Just as she was considering whether to practice a set of boxing, her phone....
If you want the clearest chapter reference, go to Chapter 112. Early on, These five people are supposed to be at odds.; later, the chapter leans on When did they become so in sync?] [I'm dying of laughter hahaha why is....
If you want the clearest chapter reference, go to Chapter 81. Early on, Qi Tianyu, who chose curry beef rice, received a piece of curry and a...; later, the chapter leans on Shu Yan was relatively lucky, she got a bundle of noodles and a bag of....
Chapter 50 is the strongest chapter-level answer because it starts from [666, if good scores determine rankings, is Flash Change's production team... and follows through on What kind of heavenly being had such a sour temper and liked dancing....
The best chapter pointer here is Chapter 78, "If you want to drink the soup made by my sister, wait for the next life!". It opens with He Yun, too, tidied up and walked over to rest in the shade of a tree. and closes on [HAHAHA, is it just me or does Movie Emperor He seem to be showing off a....
Look to Chapter 100 for the clearest answer. It begins with The barrage was about to die of laughter., keeps building through [Hahahaha, help, why is the young master always being chased!] [Next door,..., and lands on Her eyes flickered slightly as she grabbed the hand..