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[An Adulterous Love] A love song about a secret affair you can't tell anyone about
Affairs are generally considered taboo by society, but sometimes you might fall for someone without knowing they’re married.
You probably have feelings you’re keeping tucked away in your heart, too.
This article introduces songs about “affairs.”
Some songs depict people already in an affair, while others are about accepting there’s no future and choosing to part ways.
Many of these tracks express painful emotions, so you may find one that resonates with how you feel.
If you’d like, try listening to any songs that catch your interest.
[Adulterous Love] A love song about a secret affair you can't tell anyone about (1–10)
A Song Dedicated to the Worst YouNEW!Yuuri
Even knowing it’s a convenient relationship, I just can’t walk away.
This medium-tempo ballad by Yuri poignantly captures that inner struggle.
Though the head understands the partner is the worst, the lyrics portray the complex psychology of being swayed by their slyness and becoming dependent.
The raw depictions of an unattainable love—like displays of affection used to hide true feelings—are sure to pierce the heart.
Released as a single in November 2025, it sparked buzz after being performed on the opening night of the Asia tour.
It’s a song that offers solace to those suffering from a forbidden love or wishing to break free from a toxic relationship.
lingering scentNEW!indoor cats.
Though the romance should be over, even when I swear to forget, the memories left behind keep holding me back.
This song captures the aching feeling of a presence that should be gone and the heart-clenching emotions that linger in the room like a scent.
indoor cats., a band rooted in R&B, weave a jazzy sound centered on piano and organ that quietly seeps into unresolved memories and the aftertaste of a forbidden love.
The track appears on their first album, “Hodokenai Blue,” released in March 2024.
It’s sure to gently accompany those who are struggling with a love they just can’t cut off, and those who, late at night, hold feelings they can’t tell anyone.
I like indigo.NEW!indigo la End
This song portrays the frustration of being stuck in an ambiguous relationship, unable to get closer or farther apart.
The nocturnal atmosphere that seems to conjure vivid scenes—crafted by Enon Kawatani—and the supple band ensemble beautifully color the aching feelings of love.
Released digitally in advance in May 2016 and included the following month as the opening track of indigo la End’s album “Aiiro Music,” it expresses not a dramatic confession or ending, but those inexplicable emotions that linger right beside everyday life.
It may resonate with those harboring a secret love they can’t tell anyone about, or those troubled by an unattainable romance.
From the season that feels like it will freezeNEW!Aimer
A winter song by Aimer that sings of a poignant heart trapped in an irreversible flow of time amid an icy cold.
Released in February 2017, it was chosen as the opening theme for the TV drama “Love Theft, Winter,” whose love-and-hate twists drew much attention.
An extended version was later included on her best album “BEST SELECTION ‘noir,’” and this work stands as a symbol of the darker side of her discography that carves deeply into the emotions.
Even knowing it won’t be rewarded, one cannot sever the obsession and lingering attachment that continue to burn deep inside.
It’s a quiet companion for those who bear the pain of a secret love they cannot tell anyone about.
I’ll take it to the grave.NEW!Arukosaito
A heartbreaking rock ballad about the end of a secret love that can’t be told to anyone, and the resolve to bury those memories deep within and keep living.
Vivid, lifelike scenes—evoking the air of everyday life and platforms of Kansai train stations—heighten the reality of an unattainable love and tighten the chest.
This song is a signature work by Arcosite, included on the album “Until It Becomes a Memory,” released in March 2022.
It later resonated widely on social media, becoming a major topic in 2023 as its annual streams surged.
Blending quiet sorrow with the unique intensity of a band, this piece will surely stay close on nights when you struggle with an unrequited relationship and want to weep alone in silence.
Shura-banbanNEW!Yao
A thrilling pop number that channels the anger and biting sarcasm of being cheated on into humor.
Crafted by Yao, known for a cynical and distinctive perspective, the song delivers the bitterness of betrayal and a thirst for revenge through powerful vocals.
Released to the world in March 2025 as the opening track of the album “Hajimari no Uta,” it was chosen as the theme song for the NTV drama DEEP “Perfect Adultery — The Aesthetics of Concealment, The Resolve to Expose.” A drama-specific version was later released in July of the same year.
It’s the perfect track for anyone deeply hurt by a forbidden love or a partner’s betrayal, carrying an overwhelming sense of frustration, who wants to feel a refreshing sense of catharsis.
A little more, just a bit moreZARD
A song by ZARD about a love that cannot come true.
Even while knowing it’s a forbidden relationship, the protagonist finds herself wishing to be loved “just a little longer.” The song captures her emotions, and because the love is taboo, her earnest feelings resonate with a striking purity.
There’s an anecdote that Izumi Sakai, who also wrote the lyrics, felt saddened while singing it—an episode that speaks to the song’s poignancy.
Released in September 1993, this work compels deep reflection on the weight of unrequited love and the intensity of loving someone.