NXT_MARVEL

Isagi Kawaguchi was just an ordinary guy — until he woke up in the world of Blooming Hearts, his favorite school-life romance anime. But there’s a catch: he’s reincarnated as an extra. A side character so insignificant, his entire screen time in the anime was five seconds.
But Isagi refuses to stay a background character. Fueled by the regrets of his past life — where he wasted his youth buried in books — he’s determined to live life to the fullest this time. And his biggest goal? Winning the heart of May Minase, the sweet and talented girl who captured his heart when he watched the show.
There’s just one problem. Or maybe several.
Rin Kazuki, the perfect protagonist — handsome, brilliant, athletic, and already well on his way to building his dream harem. And May? She’s supposed to fall for Rin.
But Isagi isn’t backing down. From joining clubs to standing out in class, Isagi is ready to fight his way into May’s heart — even if it means taking on the ultimate protagonist himself.
Let the battle for love (and survival) begin!

My Battle for Love in a World Where I’m Just an Extra

I woke up with a splitting headache and a face full of grass.

"Ugh… what the…?" I muttered, pushing myself up. My arms felt weirdly weak, and my surroundings were definitely not my room. I was in the middle of a school courtyard, students in neat uniforms bustling around me.

Sakurazaka High. The school from Blooming Hearts, the super popular school-life romance anime I binge-watched last month. My eyes widened as I looked around, spotting familiar buildings and even more familiar faces.

Not just into the anime world, but as an extra side character. Isagi Kawaguchi. The same Isagi Kawaguchi who had a total screen time of five seconds in Episode 3, delivering a single line: "Sensei's coming!"

May Minase. The perfect girl. Beautiful, kind, talented — and the reason I fell for this anime in the first place. My heart thumped as I watched her laughing with her friends, looking radiant and happy. But then I remembered the plot.

In the anime, despite all her efforts to stay independent, May eventually became part of the protagonist Rin Kazuki's harem. Rin — the ultimate Mr. Perfect. Handsome, brilliant, athletic, and the school's top scorer.

This time, I, Isagi Kawaguchi, wouldn't stay an extra. This time, I'd change my fate. I'd fix my biggest regret from my past life — wasting my youth studying and being a total introvert.

Even if it meant going head-to-head with the ultimate protagonist.

The first class of the day was English, and I was determined to start making my mark. I slid into my seat and found myself next to a laid-back, sharp-eyed guy with messy black hair.

"Yo. You're new, right?" he asked, grinning.

"Not exactly… I'm Isagi," I said, trying to stay cool.

"I'm Kaito. Let me guess, you're gonna go after May too?"

"Dude, half the guys in this class want May. You've got competition."

My eyes flicked over to May, who was helping a classmate with their notes. A literal angel.

Kaito raised an eyebrow. "Well, good luck with that. Especially since you're up against him."

That's when the classroom door slid open, and the room fell into a hush.

The dude was practically sparkling. His presence alone was like stepping into a spotlight. Girls sighed dreamily. Guys glared jealously.

And of course, his eyes fell right on May.

My future rival had entered the scene.

After class, I decided to go big. If I wanted to stand out, I needed to stop being a background character.

So I did what any sane person would do.

"Welcome, welcome!" The president, a hyperactive girl named Saki, practically bounced with excitement. "We could always use more help! Especially with the Cultural Festival coming up!"

And that's when May walked into the room.

"Oh! You joined too?" she asked, smiling.

"Y-Yeah! I thought… you know… it'd be fun?"

"Great! Let's work hard together!"

Because Rin Kazuki stepped in right after her.

And so the battle for May Minase began.

The Extra Has Entered the Chat