What?! Did I Become the Little Sister of a Chaebol Heir?

[Transmigrated into a TV drama + both leads reborn + sweet romance + wish fulfillment]

I woke up to discover I'd transmigrated into a TV drama, and not just any drama, but Reborn Rich, the show I'd recently been complaining about. I'd even become a nonexistent 4-3? 4-2, Chen Do-jun, was reborn, while I transmigrated into the show and became a made-up 4-3. Whatever, none of that matters. Clinging to my second brother is what really matters.

Girl, with your big brother here, no one dares bully you!

Chen Yan-jun, I'm here. I won't let anyone bully you. Whatever you want to do, I'll be right behind you, shielding you from every storm.

She lit up my life. Even if I spend my whole life quietly protecting her from behind, I'll be content.

Chen Yan-jun had planned to marry the eldest grandson of the Soonyang family's sworn enemy, but who knew he'd die young? After turning it over and over in her mind, she decided that her older brother's former self, Yoon Hyun-woo, was pretty good too. Her brother was great, so Yoon Hyun-woo couldn't be bad either!

Chen Do-jun: ...Can't you pick another man?

Chen Yan-jun: Do you think you're not devoted or good enough?

Chen Do-jun: I take it back!

Chen Yan-jun: Just think, being your own brother-in-law. It makes me laugh just thinking about it. Big brother, you absolutely can't say anything bad about your brother-in-law in the future. Saying bad things about him is like saying bad things about yourself!

Chen Do-jun: I feel like you're setting a trap for me!

Chen Yan-jun: Put up with it, or I'll make your sister-in-law ignore you. Hmph!

Chen Do-jun: ...