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| Momoiro Clover Z Drop Nostalgic Summer MV “Mnemosyne” and Fans Are Already Calling It Their Most Emotional Era in Years. (Credits: Billboard JP) |
Japanese idol group Momoiro Clover Z have returned with a brand-new music video for “Mnemosyne”, and somehow managed to turn bug spray promotion energy into one of the most nostalgic summer releases of the season. Only Momoiro Clover Z could make a commercial tie-in song feel like the emotional soundtrack to everyone’s forgotten teenage summers.
The track, now released through the group’s official channels, instantly pulled attention online thanks to its bright visuals, chaotic holiday vibe and surprisingly emotional undertones hiding beneath all the cheerful madness. The new song “Mnemosyne” has been selected as the campaign track for the Fumakilla Skin Vape Series commercial, which also features the members themselves in the currently airing “Supporting Everyone’s Obsessions!” television campaign across Japan.
While the collaboration sounds very corporate on paper, the actual song feels far more personal than expected. Built around the theme of “summer memories”, the track mixes upbeat melodies with a slightly sentimental atmosphere that quietly sneaks up on listeners halfway through.
It is the kind of song that makes people suddenly remember old festival nights, melted ice cream, awkward summer romances and fireworks they probably swore they forgot years ago.
The songwriting and composition were handled by long-time collaborators invisible manners, whose work with the group has often balanced playful lyricism with emotional hooks.
This time, the lyrics also include subtle references connected to insects, matching the concept behind the Skin Vape campaign.
It sounds ridiculous when explained out loud, yet somehow works perfectly inside the song. That very specific brand of organised chaos has basically become part of Momoiro Clover Z’s identity at this point.
The music video itself leans heavily into surreal summer fantasy. It begins with a mysterious doorway marked “VACATION”, complete with a roulette wheel that sends each member into different worlds depending on where it lands.
From there, the MV becomes a colourful sprint through various summer holiday scenarios, showing the members enjoying everything from carefree outdoor moments to energetic dance sequences packed with the group’s trademark over-the-top expressions.
One of the standout scenes arrives during the fireworks sequence, where all four members reunite under the night sky in a much softer and nostalgic atmosphere. The contrast works surprisingly well.
One minute the video feels like a hyperactive summer advert running on zero sleep and too much shaved ice, and the next it quietly slows down long enough to remind viewers how fleeting those summer memories actually are. That emotional switch has become one of the biggest talking points among fans online.
Reactions across social media have been varied in the best possible way. Many longtime supporters praised the group for returning to a classic emotional summer style that feels distinctly tied to older Japanese idol music traditions.
Some fans described the MV as “healing chaos”, while others joked that they were not expecting to feel emotional over a song connected to insect repellent.
Several viewers also pointed out how natural and expressive the members looked throughout the video, saying the chemistry between all four remains one of the group’s biggest strengths even after years in the industry.
Meanwhile, newer listeners have been particularly drawn to the visual storytelling and nostalgic atmosphere. Clips from the fireworks scene and roulette sequences quickly began circulating online, with many commenting that the MV feels like a mix between retro summer cinema and an oddly emotional travel advert.
Others simply admitted they came for the colourful visuals and accidentally stayed for the emotional damage. Alongside the MV release, Momoiro Clover Z also announced a special screenshot-sharing campaign linked to the video.
Fans who watch the full version of “Mnemosyne”, capture their favourite memorable scene and share it on X will have the chance to receive special prizes through a lottery campaign running until the end of May.
In total, 640 winners are expected to receive rewards, which immediately sent dedicated fans into detective mode trying to pick the “perfect” screenshot frame before everyone else does.
For many viewers, “Mnemosyne” feels like one of those deceptively simple releases that becomes more emotional after a second watch. Beneath the bright colours, chaotic holiday energy and cheerful dancing sits a surprisingly reflective look at fleeting summer memories and growing older without fully noticing it.
Very few idol groups can jump from absolute nonsense to emotional nostalgia within seconds quite like Momoiro Clover Z, and honestly, that unpredictability might be exactly why people keep coming back.
Now the real question is whether “Mnemosyne” becomes this year’s sleeper summer anthem or simply the most emotional bug spray campaign anyone has witnessed in recent memory. Either way, fans already seem fully invested. And judging by the reactions online, plenty of people are now replaying the fireworks scene far more times than they probably planned to admit.