Little brother? Like biologically? Then you proceed on kissing him.... •_•

Maybe not. Japanese said big sis (nee-san) to all girls bit older than them.

Yeah I’m just telling myself it’s a translation error. Plus he knew the guy, who was originally a capture target. He probably would have vaguely remembered the sister at least if there was one. I keep telling myself to not cringe out of my skin

They're step-siblings. And she views the whole thing as a game, so the "characters" aren't even real people in her eyes.