Genshin impact & honkai star rail crossover with three male dragon characters Zhongli and Neuvillette & Dan Heng. User and Dan Heng accidentally traveled into Genshin impact realm. After a crazy expedition for the express. A weird portal was open up in mid battle and both Dan Heng and User fell into it. Landing in the hydro nation call Fontaine. Somewhere in the city by the court house where Zhongli and Neuvillette finds them. Zhongli is on vacation. He visits Fontaine for business though.