An idol sings a mutual-love song. A collection of happy love songs.
Among the songs sung by idols, there are so many love songs! From bittersweet ballads to upbeat tracks that capture the flutter of romance, there’s a wide variety.
In this article, we’ll be introducing songs that celebrate mutual love from among those many romance tracks.
Each one tells the story of two people who care for each other, so you’re sure to find heartwarming songs that make you feel warm inside.
Be sure to listen while thinking of someone special to you.
Mutual-love songs sung by idols. A collection of happy love songs (1–10)
jealousNEW!Nakajima Kento
This song was released early on December 2, 2024, and is included on Kento Nakajima’s album “N / bias.” It’s crafted as a pop tune featuring a modern, breezy sound infused with New Jack Swing elements.
The lyrics portray a yearning love and jealousy so intense it even envies the moon in the night sky.
Kento Nakajima himself took part in writing the lyrics, which are said to layer not only the image of lovers longing for each other across a distance, but also the emotional bond with fans and the poignancy of the time spent apart.
With a melodious, sweet vocal riding a light, groovy beat, it’s a perfect track for anyone who wants to brighten and enrich the feeling of thinking about someone in everyday life.
Be sure to enjoy it alongside the liberating dance scenes in the music video.
The 5thNEW!＝LOVE
=LOVE, the group produced by Rino Sashihara.
Their song “The 5th,” brimming with classic idol charm, was released as a single in December 2021.
Marking the fifth winter since 2017’s “Bokura no Seifuku Christmas,” this work portrays a romantic moment between two people who have grown a little more mature.
The lyrics—evoking vivid images like a ring on the ring finger and white snow—set listeners’ hearts aflutter.
With a sparkling, dreamlike melody reminiscent of city streets glowing with illuminations, it makes the winter air feel all the more romantic.
It’s perfect not only for a special night spent with a loved one, but also for those moments when you want to immerse yourself in music alone in the clear winter air.
Its heartwarming story and gentle vocals are sure to make your winter feel wonderfully special.
That girl complexNEW!＝LOVE
A work that vividly portrays the ache of not being able to become someone special to the person you love and the inferiority you feel when you compare yourself to someone else.
It’s the title track of their 11th single, released in May 2022, with Maika Sasaki serving as the solo center for the first time.
The song drew significant attention, reaching No.
3 on the Oricon weekly chart and surpassing 10 million views on its music video.
Setting itself apart from straightforward, upbeat pop, its fragile yet serious worldview tightens around your heart.
If you listen when you’re anxious over an unrequited love and on the verge of losing yourself, its delicate vocals will gently stay by your wounded heart.
A gem of a heartbreak song that we highly recommend to anyone carrying the pain of earnest emotions.
This sky is the triggerNEW!＝LOVE
Its bright, glittering, classic idol-pop melody intersects with the ache of unrequited love to strike straight at the heart.
Though it sounds glamorous, what it portrays are the sweet-yet-bitter emotions of a love that won’t be returned.
That gap between cuteness and bittersweetness makes it irresistible, doesn’t it? Released in February 2023 as the group’s 13th single, this work wasn’t backed by a major tie-in; instead, it’s been cherished through events that connect directly with fans, such as special release-commemoration lives.
Surpassing 200,000 copies in its first week, it stands as a symbol of the group’s momentum.
It’s perfect for those wrestling with an unattainable love or anyone who wants to feel the sparkle of youth.
While it stays close to your aching feelings, it also brings a refreshing breeze to your heart.
Poisoning by a deleterious drugNEW!＝LOVE
An enticing pop tune that lets you feel as if you’re sinking into a sweet yet dangerous swamp of romance.
With lyrics penned by Rino Sashihara, it portrays an earnest longing that draws you to someone beyond reason.
The sound, blending a dark mood with exhilaration, stirs the heart with every listen.
Premiered on a TV music show as the title track of their 20th single, slated for release in April 2026, it has garnered major buzz.
With bonus video content featuring live performance footage, this work showcases the group’s momentum.
Perfect for those who want to revel in the thrills of a provocative love story or boost their mood with a powerful dance beat.
Be sure to add it to your favorite playlist.
I’m totally in love ♡NEW!CANDY TUNE
Here’s a pop, high-energy number that captures the rush of falling in love.
Blending a heavy rock sound with a cute world that expresses affection straight from the heart, this track lets you fully savor CANDY TUNE’s charm.
With lyrics by Suu and music by NAOKI KUBO, it sparks overwhelming excitement at live shows.
Included on the album “Baibai FIGHT!” released in October 2025, it later served as the opening theme for a TV program.
The music video, which portrays a game world set in a land of sweets, also became a hot topic.
It’s an upbeat tune perfect for those who want to go wild at concerts or soak up some positive energy.
Just kidding!NEW!SWEET STEADY
I can’t stop thinking about the person I like.
This SWEET STEADY track captures a love that can’t quite be expressed honestly, set to a brisk, poppy sound.
The frustration of not being able to put it into words and the bashful emotions overlap with the sweet melody and bouncy rhythm, making your heart race just by listening.
The song was released in April 2024 and was later included on the classic “Pajama Party! / Diamond Days” in December of the same year.
At their one-man show in June, there was a production where silver streamers fluttered at the moment everyone jumped near the end, captivating the fans.
This piece has grown alongside the energy of the live scene.
If you can’t quite convey your feelings to the one you like and need a little push, why not give it a listen?