I'd like to clarify something about My Baby Brother is the Strongest Character lore
The "Real World"
Lookism exists as a webcomic.
The Reader dies after choking on fried chicken skin.
First Rebirth is during the Pre-Generation.
This is where the timeline branches out into two possibilities.
Constants:
You are a Yamazaki, born as the illegitimate older sister to Shingen and Shintaro.
You remember your first life during your stay in Japan.
For some reason, you end up in South Korea as an amnesiac. You don't remember your first life and your time with the Yamazakis.
You meet Gapryong Kim and the rest of the gang.
Gapryong Kim loves you in both realities.
Variables:
One version of Noona is the one who exists in the "Reborn in the Pre-Generation" posts. (I don't know her future just yet.)
The other version of Noona does not necessarily go through every event that happens in "Reborn in the Pre-Generation." This is the Noona who dies and gets reborn as the current Noona.
Second Rebirth is during the Era of the First and Second Generations, aka the current timeline
Two important things to note:
You don't remember your first rebirth, only your life in the real world.
There is only one variable here, and that's the birth of Baby (Noona's son with Gitae Kim).
I hope that cleared things up, readers! But if you guys have any other clarifications then feel free to ask me.
(｡•̀ᴗ-)✧