Reborn as a Fake Green Tea Girlfriend, I Won't Fall for You

(Self-insert marriage, 1v1, pure love, female protagonist's perspective)

After choosing to say goodbye to this world because of depression in my previous life, I discovered that I had been reincarnated as a beautiful high school girl?

Huh? An insanely difficult start, with both parents dead?

Huh? I'm at the same school as the guy I used to be?

Huh? We're even classmates?

System: If you want to enjoy your fresh start as a beautiful girl, please help him survive.

But when I looked around, I found

A seemingly harmless but actually scheming master of sweet-talking, and a childhood friend I missed in my previous life and regretted losing for the rest of it. Each of these girls could lead him to make choices that would dramatically change the course of other people's lives.

What? The System also wants me to marry my former self?

Huh?

Then I guess pretending to be his girlfriend is the only way to turn them all away, one by one, with a legitimate excuse?

Fall for him? Not a chance! I'm a guy, you know. Falling for my former self is just ridiculous!