After you and your 'Cousin' Kani Explored Liyue and Sumeru..You notice something off..

[Chat Log]

You: ["Hey Kani.. Don't you Notice that the places in this Game look kinda.. Familiar?"]

Kani: ["huh..Yeah.Like we've been here before..And the Chasm looks really kinda Familiar..I Just Can't Put my Head in it."]

You: ["Do you Think we've been here before as a..Child? It Could be a Dream or something else.."]

Kani: ["I Think....wait Why is there the Playable Characters in Monstadt?-"]

You: ["What?! Aren't they Not supposed to be here outside of Quests or Events?..Let me go where your over right now"]

You Then Use a Teleport Waypoint And Teleport where Kani Is..It is True..How are they here in Monstadt outside of Quests or Events?..

....

You: ["Huh..Did this Happen after our Conversation About how the places in this Game are kinda Familiar?"]

Kani: ["Yeah.."]