"WHO'S THE EX?"- Fans intrigued as BLACKPINK's Lisa drops emotional 'DREAM' short film trailer, featuring Kentaro Sakaguchi

On August 12, 2025, Lisa unveiled the trailer for the upcoming short film of her track Dream, instantly setting social media abuzz. The emotional clip also stars Japanese actor Kentaro Sakaguchi. It offers a hazy, nostalgic look at a romance that once burned bright but ended in heartbreak.

The nearly one-minute teaser goes from soft and blurred moments of the pair enjoying each other’s company to a solemn scene where they face each other with heavy eyes. Kentaro’s voice-over in Japanese is accompanied by English subtitles.

He reflects on how all good things come to an end and how time can’t return. He said,

"We ended, just like that. All good things must come to an end and so did we. Nothing in this world can rewind time. So all I could do, was to just look at you. One last time. I couldn't do anything."

The short film will premiere on August 13 at 11 p.m. EST. It is inspired by Dream, the thirteenth track from Lisa’s debut solo album Alter Ego, which was released on February 28 this year.

Fans were quick to react online, with many intrigued to uncover “who’s the ex” behind the emotional story. An X user, @zacariaaah, wrote,

"BROOOOO I'M SO EXCITED!!! SO, WHO'S THE EX???"

When Alter Ego first dropped, listeners had already speculated about the song’s references to Tokyo and 2019. The trailer has only deepened their curiosity. They expressed excitement to see what the track was about. Meanwhile, others admitted they were bracing for an emotional rollercoaster.

Many felt the film would be a deeply personal and possibly heartbreaking journey. A few even pointed out Lisa’s styling in the teaser, noting similarities to her 2019 look. They wondered if the black-and-white and colored scenes carried symbolic meaning.

About BLACKPINK's Lisa's track, Dream, co-star Kentaro Sakaguchi, & more

Dream stands out on Alter Ego as a rare ballad. Lisa shifts away from her strong rap flow in the album and embraces more confessional vocals. The lyrics recall memories of longing for a past relationship.

It also talks about a night in Tokyo when she had the opportunity to connect with someone. However, she never did. She seems like she wants to hold on to her memories. The lyrics of the track read,

“Whenever I close my eyes/ It's taking me back in time/ Been drowning in dreams lately/ Like it's 2019, baby.”

While fans have been speculating about the person behind the song, the K-pop star has never confirmed the identity. It leaves the meaning open to interpretation. The track was co-written with Ali Tamposi, Feli Ferraro, Shintaro Yasuda, and her0ism. Moreover, its gentle production contrasts with the album’s bolder sounds.

On the other hand, Kentaro Sakaguchi, her co-star in the film, is a widely known actor and model in Japan. He began modeling in 2010 and acting in 2014. His on-screen chemistry with Lisa in the teaser has already generated conversation and anticipation among fans.

As of now, Lisa is continuing her Deadline World Tour with BLACKPINK.

About the author

Mantasha is a pop culture writer at Sportskeeda who covers K-pop and K-drama. She has recently completed her Masters in English and has a rich 3-year writing experience where she crafted engaging content for top companies such as Unacademy, Apollo Hospitals, Adani Airports, and the Economic Times. Her experience has helped her create a strong foundation that complements her passion for creating the best content related to K-pop, K-dramas and Korean movies.

Mantasha's interest in pop culture took root when her cousin introduced her to classic Hollywood and Bollywood tunes and the rest, as they say, is history. Mantasha’s connection with K-pop supergroup BTS is a special one as their song lyrics, hard work, and dedication resonate with her like no other group does.

Maintaining accuracy, relevance, and ethics in her reporting is extremely essential for Mantasha. She prioritizes thorough research, delving deep beyond just superficial sources, to ensure comprehensive and trustworthy information.

When not writing, Mantasha enjoys journaling and doodling, watching K-dramas and listening to songs.

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Edited by Somava