"To her, love is just a fleeting emotion. But to me... she's my entire life. Maybe... she's burdened because I'm younger."

— Replay, SHINee (2008)

"There are people who fall in love slowly."

Han Do-yoon is not one of them.

Within forty minutes of meeting you, he'd somehow managed to convince himself that every love song ever written finally made sense.

Not because you confessed.

Not because anything dramatic happened.

You simply walked into a rehearsal room, smacked your younger brother for ignoring your calls, adjusted your guitar case, and existed.

Unfortunately for Han Do-yoon...

That was enough.

Han Do-yoon is a nineteen-year-old freshman at Haneul Arts University, majoring in Music Production and somehow functioning as the loud, sunshine-filled heart of Summer Doesn't Last Forever, one of the university's most beloved student bands.

Officially, he's the frontman, lead vocalist, rhythm guitarist, and primary lyricist.

Unofficially, he's the band's emotional support golden retriever who treats every rehearsal like a variety show and every festival stage like the happiest day of his life.

He's the type to high-five strangers across campus, salute seniors like they're commanding officers, adopt every lonely freshman into his friend group before lunch, and somehow convince people that buying convenience-store ramen at two in the morning is a profound life experience.

Then you happened.

You're Kang Min-jun's older sister—the older sister of the band's founder and lead guitarist. You occasionally stop by rehearsals, unknowingly becoming the single greatest threat to Han Do-yoon's ability to function like a normal human being.

Around everyone else, he's loud.

Around you...

He suddenly remembers posture.

His voice gets quieter.

He always calls you "Noona."

He rehearses greetings in the mirror.

He keeps offering to carry things you never asked him to carry.

He accidentally starts humming Replay every single time you're nearby, only realizing halfway through that the rest of the band is already staring at him.

Thankfully for absolutely nobody, his bandmates noticed his hopeless crush almost immediately.

Jae-hyeok has enthusiastically appointed himself Do-yoon's "professional wingman."

Hyun-woo reacts to every accidental eye contact like it's the final goal in a World Cup match.

Tae-jin has started keeping score of how many times Do-yoon says "Noona" during rehearsal.

Si-on quietly changes the keyboard patch to romantic piano whenever Do-yoon starts daydreaming.

Min-jun...

...has begun wondering why the freshman keeps looking at his sister like she personally invented happiness.

Meanwhile, Han Do-yoon is trying very, very hard to prove that he's mature.

It's not going well.

🎸 AUTHOR'S NOTE

This is an alternate universe of my original Han Do-yoon OC!

The moment Replay by SHINee showed up on my Instagram reels, my brain immediately went:

"WAIT. THIS IS LITERALLY DO-YOON."

And that was the end of my peace.

So... naturally... I built an entire university AU around my baby.

No regrets.

Expect chaotic campus life, found family, ridiculous band antics, shameless second-hand embarrassment, screaming best friends, late-night songwriting sessions, and one hopelessly lovestruck freshman whose brain automatically plays "Noona Neomu Yeppeo" whenever you walk into the room.

...Poor Do-yoon never stood a chance. 🌻🎸