What makes The Book of Us: Gravity by Day6 notable?

The album received positive reviews for its lyrical depth and musicality, showcasing Day6's growth as songwriters and musicians. It debuted at number one on the Gaon Album Chart, further establishing their presence in the K-pop scene while appealing to a broader audience with its rock influences. Released on July 15, 2019, The Book of Us: Gravity is Day6's fifth mini-album, following their previous release, The Book of Us: Entropy. At this point in their career, Day6 was solidifying their identity as a band capable of tackling complex emotional themes through their music, moving beyond typical K-pop formulas.

Who is The Book of Us: Gravity for?

The Book of Us: Gravity works well if you're into steady mid-tempo emotional flow, for short listening breaks and reflective moments of connection.

How many songs are on The Book of Us: Gravity?

The Book of Us: Gravity has 6 tracks, running approximately 21 minutes.

The Book of Us: Gravity

Day6 · 2019

21 min · 6 tracks · K-pop

A vibrant blend of K-pop and rock, weaving heartfelt lyrics with dynamic instrumentals to explore themes of love and connection.

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Top tracks — play these first

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How to love — This track captures the essence of navigating complicated emotions in relationships with its catchy melody and relatable lyrics. Its upbeat tempo contrasts the vulnerability expressed in the writing.
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Best Part — A poignant ballad featuring harmonized vocals that beautifully convey the yearning and joy found in love. The arrangement allows each member's voice to shine, reflecting their growth as artists.
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For me — Opening the album, this track sets an introspective tone while exploring self-love and acceptance. Its strong instrumentation supports a powerful vocal delivery that resonates deeply.

Elevation

Our rating, out of 100 — and why.

AI-generated from five scored dimensions. An opinion, not a measurement.

59 /100

Treeline

Higher than 57% of albums we've rated

The EP showcases strong songwriting and production, with a consistent sound and emotional depth across its tracks.

What we noticed

The first track opens with a soft piano melody that gradually builds in intensity, leading into a full band arrangement by the second track.
Each song features a prominent guitar riff that intertwines with the vocal melodies, creating a cohesive sound throughout the EP.
The final track concludes with a fade-out, leaving an open-ended feeling that contrasts with the more resolved endings of earlier songs.

Composition 25% of the score: 7/10
Craft 20% of the score: 8/10
Durability 25% of the score: 6/10
Distinctiveness 18% of the score: 6/10
Sequencing 12% of the score: 7/10

Influence 4/10

Known within its scene. Reported but not counted — how far a record travelled describes its reception rather than the record, and a newer release has had less time to travel than an older one.

Is this for you?

Good fit if you like

steady mid-tempo emotional flow
for short listening breaks
reflective moments of connection
light-hearted sing-along potential

Maybe skip if you

prefer longer immersive albums
seek high-energy instant gratification

Where this album fits

Career context: Released on July 15, 2019, The Book of Us: Gravity is Day6's fifth mini-album, following their previous release, The Book of Us: Entropy. At this point in their career, Day6 was solidifying their identity as a band capable of tackling complex emotional themes through their music, moving beyond typical K-pop formulas.
Stylistic neighbors: The Rose· N.Flying· CNBLUE