Seongsu hair salon cut-only layered makeover for long hair: Toni&Guy

In short

Toni&Guy Seongsu is a hair salon near Seongsu and Ttukseom stations in Seoul, spread across the 2nd and 3rd floors of a building on Sangwon 1-gil. Long hair that had grown heavy was reshaped into hush-cut-style layers with a cut alone — no perm and no color — after a written consultation covering the look you're after, face shape, parting and everyday styling. A useful read if you have long hair and want a new mood without any chemical damage.

Visitor's long hair before the cut

Good to know

Location
35 Sangwon 1-gil, Seongdong-gu, Seoul (near Seongsu and Ttukseom stations)
Size
Uses both the 2nd and 3rd floors of the building
Service
Cut only (no perm, no color)
Consultation
Written form covering desired look, face shape, parting and usual styling

as written by the visitor on Sep 23, 2026

I hadn't cut my hair in a while, so while looking around for a Seongsu hair salon I ended up at Toni&Guy Seongsu!! My hair had gotten so long that at some point it just became... boring, you know? Haha. But changing the vibe with a perm or color felt risky because of damage concerns, so I went in hoping and wondering if I could get a real change with just a cut ˶ ̇ ̮ ̇˶

Visitor's long hair before the cut

Where is Toni&Guy Seongsu on Sangwon 1-gil, and what is the salon like?

Toni&Guy Seongsu is a hair salon that shares the 2nd and 3rd floors of a building on Sangwon 1-gil in Seongsu-dong. The building itself caught my eye right away!

Exterior of the Seongsu-dong building housing Toni&Guy Seongsu

The building has such a mood... !!! It felt like something out of another country haha, very trendy, matching this hot neighborhood!

Seongsu-dong salon building with an overseas-style feel

And Toni&Guy Seongsu turned out to be bigger than I expected! They use both the 2nd and 3rd floors of the building.

Entrance to Toni&Guy Seongsu, which uses both the 2nd and 3rd floors
Floor guide and entrance view of the Toni&Guy Seongsu building

I came in through the 2nd floor, and stepping inside felt even more trendy and clean-cut. The designer greeted me so kindly that it put me in a great mood.

Clean, trendy interior of the 2nd floor at Toni&Guy Seongsu
Styling seats inside Toni&Guy Seongsu

Overall Toni&Guy Seongsu has such a stylish mood that fits right into the neighborhood!

Overall view of the stylish Seongsu hair salon interior

What you write on the consultation form before the cut

At Toni&Guy Seongsu, I filled out a detailed consultation form before the cut. What I liked about the consultation was how thorough the form was — desired look, face shape, whether I tie my hair up often, my usual styling habits, parting shape, whether I often tuck hair behind my ears, and more. For the style I was going for, I checked off a feminine mood.

Toni&Guy Seongsu — Before

Before photo of drooping long, straight hair before the cut
Before photo of long hair with no layers, back view

This is what my hair looked like before the cut. Truly long hair + boring hair itself — long, but just kind of drooping and lifeless. Talking through all these concerns, I could tell designer Sangyeon really puts effort into the consultation! I'd never met a designer who consulted this thoroughly for just a cut, haha haha.

In front of the mirror after the consultation, before the cut begins

Hush-cut layers on long hair with a cut alone

I didn't show designer Sangyeon any reference photos — I just left it up to her, and the result was layered hair with a hush-cut feel. I didn't bring any photos; the moment I saw how stylish Sangyeon herself was, I just said, please do whatever you think is best!

Designer Sangyeon performing the layered cut

Her hands moved fast but she was still so meticulous, and I felt she gave me a slightly distinctive style tailored to my hair length and face shape.

Layering the cut to match the face shape

It had a bit of a hush-cut feel with layers throughout, which made my hair look so much lighter overall.

This kind of style! She cut it to match my face shape and adjusted the parts I wanted improved with a personalized cut. She also carefully explained how to style it at home.

Seongsu hair salon Toni&Guy — After

Finished layered cut with a hush-cut feel

How to blow-dry and flat-iron the layered cut at home

Finished look! The back had more layers than I expected, which surprised me a little at first, but she showed me separately how to blow-dry it and how to use a flat iron, so I could style it nicely myself. You know how it looks great at the salon but you turn into a total disaster the moment you get home... but she explained it so carefully.

When I sweep my bangs to the side, they fall so naturally and look pretty. The whole vibe feels more elegant and a bit more upscale now!

Finished layered cut with bangs swept to the side

Who is this cut-only layered style right for?

I only went in to tidy up my hair this time, but my style ended up changing way more than expected. If you have long hair that feels too heavy and stuffy, or you want to naturally add layers to change the mood, this kind of style could work for you too. I really love the bangs from this new style. If you're searching for a Seongsu layered perm or Seongsu sand perm, I'd recommend checking this place out! The location is also easy to reach from Ttukseom Station, so it's worth a look if you're searching for a Ttukseom Station hair salon!!

Where it is

Toni&Guy Seongsu토니앤가이 성수점

35 Sangwon 1-gil, 2nd and 3rd floors, Seongdong-gu, Seoul, South Korea서울특별시 성동구 상원1길 35 2, 3층 토니앤가이 성수점

Open in Google Maps

Local places · Hair & beauty salons