Is this a love triangle / 3P?

I don't think so, From what I understood, the older brother is the protagonist of "do you still like me?"
*Spoiler*





It should be an alphaxalpha with the blondish guy

The alpha x alpha couple is from "do you still like me?" or from "Still, I like it"?

Well "do you still like me?" Is a spin-off of "still, I like it" so the characters are the same but in "do you still like me?" They delve deeper into the older brother relationship
P.s I didn't read "do you still like me?", All my info is from the comment under the manhwa page

Alright thanks for the info