Reminiscing with I.O.I in "Suddenly" | Adli's Quick Music Review

Cover art for Suddenly.
Credit to I.O.I, embedded from Apple Music / iTunes.

This article is written in English. Untuk membaca versi Bahasa Indonesia, klik di sini.

TL;DR

When I first heard it, my gut reaction was "skip."
But over time, this song found its own little place in my heart.

Notice

This article aims to review and share information about this music/song.
There is no intention to infringe any copyright.
Copyright of any images, videos, audio, or other media used in this article belongs to their respective owners, whether the musician or record label, unless stated otherwise.
The author is not affiliated with the musician, label, or any other parties related to this song.
This article is purely a review from the author's personal perspective and listening taste.
This article is based on my experience listening to this song/album repeatedly. Opinions regarding mixing or audio may vary depending on the device used.
This article was translated from Indonesian to English by Claude. The quality may not be up to par with human translation.

Music Details

Music Video

Go ahead and watch the Music Video below :)

아이오아이 (I.O.I) - 갑자기 (Suddenly) MV

Credit to Stone Music Entertainment and SWING ENTERTAINMENT channels on YouTube.

Quick Review and Rating

Quick Review

Honestly, when I first heard this song, my initial impression was "skip." I mean, compared to I.O.I's previous title tracks that leaned more toward a hard-hitting beat — like Dream Girls, Whatta Man (Good man), and Very Very Very — this new release, as a comeback after years of silence, naturally felt like it was "lacking punch." Well, though there's also DOWNPOUR, which was also popular among the public as I.O.I's mellower offering.

But over time... this song kept getting shared on my timeline and showing up on the For You page, and gradually... it found its own quiet little place in my heart.

Quick Rating

Category & Rating Details	Score
1. Vibe & Atmosphere Melody & Mood: The melody... as a casual listener, it doesn't come across as particularly complex. There's a lot of layering and plenty of instruments, but it's not overly intricate. As for the overall mood, I'd say this leans toward the nostalgic or city pop type of song. Hmm... you know that feeling where you want to cry but there's this ache caught in your throat? That's the kind of feel this song gives off. Even though I might not be that fluent in Korean, the choice of lyrics, the vocal delivery, the emotion, the sense of longing — it all comes through so strongly. Like when you haven't seen someone you once loved in a long time, and then you suddenly run into them, and you're overwhelmed with a bittersweet kind of joy. That feeling. Comfort on the Ears: Very comfortable. The mixing is smooth — nothing causes any ear fatigue even on repeated listens. There are some high notes, but nothing sharp enough to be unpleasant.	10
2. Lyrics & Message Theme & Story: This song tells the story of someone longing for a person who was once part of their life. Memories, moments, times long past — somehow coming back all at once. But my personal take is that this song is actually more of a reflection of how I.O.I's fans feel toward I.O.I themselves. From the lyrics, the themes raised, and the overall vibe, this song feels like it's describing how fans might be missing the memories they made together with I.O.I. Diction: This is... one of the reasons why older-generation K-pop is more enjoyable to listen to, in my opinion. They can "speak" clearly — their articulation is distinct. So even without reading the lyrics on screen, what the singers are singing can be heard and parsed word by word. And I.O.I delivers on that front. Even if you're not looking at the lyrics, you can hear what's being said clearly — and when the words are clear, the message comes through easily. Oh, one more thing. Since I find the word choices and lyrics to be "not particularly complex," and the tempo is slow, this song should be easy to memorize for singing along or karaoke 😄	10
3. Vocals & Delivery Vocal Fit: Spot on! There are quite a few members — nine — and they all have to share parts within a song that's only 03:15 long. But the way the parts are divided and how each voice fits feels just right. Like how Chungha builds up before Yeonjung, or how Doyeon builds up before Chungha — everything is distributed neatly and according to each member's strengths. Emotion: The feeling really comes through, in my opinion. The theme is nostalgic, and each member's vocal style here manages to carry that sense of nostalgia beautifully.	10
4. Replay Value & Context Replayability: Even though I initially felt like this was a "skip" — before long, you'll find yourself suddenly humming 갑자기 — kabjagi — out of nowhere 😂 That's just what this song does. It kept appearing on my timeline, on the For You page, and eventually it just stuck 😂 And somehow, even on repeated listens, it never feels boring. Context: After years without a new release — I mean, their contract was short and packed, only around four to six months — this song... might not have felt like much of a punch at first. Like I mentioned earlier, compared to other title tracks that hit harder, this one felt like just an "oh" moment on first listen. But... over time, I think this is actually the perfect song for a return to the K-pop music scene. Selling the nostalgia worked, the song is great and easy listening, the lyrics are solid, and the reception and promotion are starting to show organic results — which is good, good, and good.	10
TOTAL SCORE (Average)	xx

Live Performance Video

If you search on YouTube, you'll find several of their performances on various Korean music shows. The promotions only ran for about a week, but it seems like it was enough to satisfy the fans' longing. One of my favorites is the performance below:

I.O.I (아이오아이) - Suddenly (갑자기) | Show! MusicCore | MBC260523방송

Credit to MBCkpop channel on YouTube.

Closing

This song... taught me to try to lower my expectations toward veteran groups and their past releases, and to stay open-minded when encountering something new. Perhaps, with the overwhelming flood of information in this era, the ears and the heart just need a little time to accept that "Oh? This song is actually good and the vibe is right."

Because maybe... a Hidden Gem, true to its name, only reveals itself when you're willing to look a little more calmly — without rushing to make up your mind.

That's all for this review!

See you in the next Adli's Quick Music Review :)