When does the drama series start?

Sequential release begins on June 17, 2026.

What is the campaign prize?

Calpis Water 500ml PET, one case each for up to 300 winners.

A vertical short drama creator group with over 12 billion total views and 6 million followers.

Who are the cast members?

Sasaki Honoka, Goto Koki, Hime no Hina (from #Mooove!), and other young actors.

How can I enter the campaign?

Via the official campaign site and the @calpis_mizutama X account.

Asahi Beverages' Calpis and GOKKO Club Collaborate on Youth Short Drama Series Depicting High School Students' After-School Lives

Published Jun 17, 2026 6:00 PM ・ Updated Jun 17, 2026 9:28 AM ・ 10 min read ・ Source: PR TIMES

Asahi Beverages' 'Calpis Water' and vertical short-form drama creator group 'GOKKO Club' have partnered to launch an original youth short drama series centered on high school students' after-school lives, premiering sequentially from June 17, 2026.

GOKKO Inc. (Headquarters: Tokyo; Representatives: Sato Tanaka, Satoshi Tada), the company operating the vertical short-form drama creator group 'GOKKO Club,' has partnered with Asahi Beverages Co., Ltd.'s 'Calpis Water' to sequentially release an original youth short drama series themed around 'after-school life' starting June 17, 2026.

This project will present a series of youth episodes reflecting the everyday lives of diverse high school students, centered on 'after-school time' and 'Calpis Water.' The series will cover relatable teenage experiences such as club activities, romance, fireworks festivals, summer festivals, returning home for holidays, studying, and cultural festivals.

The dramas will be distributed via GOKKO Club's TikTok, Instagram, YouTube, and X accounts, as well as through Asahi Beverages' official social media channels.

Project Overview

'Calpis' has been a brand that has accompanied people's youth and daily lives for over 100 years.

This initiative expresses the brand's current communication theme, 'Return to Myself,' through vertical short-form dramas.

From classroom moments after school, the walk home from club practice, promises made at summer festivals, to nights spent worrying about the future—these stories will depict the joys, struggles, hopes, and anxieties found in everyday life, evoking each viewer's personal memories of their own unique youth.

Drama Introduction

Starring: Honoka Sasaki in 'The Secret Only Popular Girls Know'

'The Secret Only Popular Girls Know'

Kirara is the quintessential 'popular girl' admired by everyone at school. But behind her perfect image lies a secret she can't share with anyone. This is a coming-of-age love story about a girl who hides her true self, as she confronts what genuine kindness really means.

Cast: Honoka Sasaki, Koki Goto, Hina Hime no (from #Mooove!), Kourin Yoshimoto, Shinko Nee, Kazuki Itagaki, Kazuki Kaminose

Director & Screenwriter: Yui Ohnai

Campaign Overview

To coincide with the series launch, a viewer participation campaign in collaboration with Calpis will be held! Win Calpis WaterⓇ!

Campaign Period

July 13 (Mon), 2026 – July 26 (Sun), 23:59

Prizes

'Calpis WaterⓇ' 500ml PET, 1 case each for up to 300 winners

Campaign Details

Information will be shared via 'Calpis Mizutama Tsushin' (@calpis_mizutama)

https://x.com/calpis_mizutama

Special Website

https://www.calpis.info/cw2026cp-houkago/

*For details on eligibility, prize announcement, and important notes, please visit the special website.

About 'Calpis'

'Calpis' Logo

Since its launch in 1919, 'Calpis' has been a beloved lactic acid beverage brand for over 100 years.

Valuing 'human connections' and 'emotional richness,' the brand has been cherished across generations. Today, it offers a wide range of products, including 'Calpis Water.'

About Calpis

Asahi Beverages Logo

Company Name: Asahi Beverages Co., Ltd.

Address: 1-23-1 Azumabashi, Sumida-ku, Tokyo 130-8602

Established: March 30, 1982 (Showa 57)

Founded: April 1, 1972 (Showa 47)

Employees: 2,452 (as of March 2026)

Capital: ¥11,081,688,000

Business: Manufacturing and sales of various beverages and related operations

Official Website: https://www.asahiinryo.co.jp/index.psp.html/

◾️ About GOKKO Inc.

GOKKO Inc. Logo

Past, present, and future—unstoppable growth and global ambition.

GOKKO Inc. is a creative company that brings together next-generation entertainment leaders.

The creator group 'GOKKO Club,' which continues to produce vertical short-form dramas themed on 'the small loves we often overlook in daily life,' was founded in May 2021 by six members. In 2022, GOKKO Inc. was established, creating a world-class integrated production system where planning, scripting, filming, editing, posting, and marketing are handled by a single team. To date, over 4,000 works have been produced and posted, surpassing 12 billion cumulative views and over 6 million total social media followers, maintaining one of the largest reach scales in the short-form drama space in Japan.

*Including joint accounts

Company Overview

Vertical short-form drama studio 'studio505'

Location: Tokyo

Representatives: Co-Representatives Sato Tanaka (President & CEO), Satoshi Tada (President & CEO)

♧ Corporate Site: https://gokkoclub.jp/

♧ TikTok: https://www.tiktok.com/@gokko5club/

♧ Instagram: https://instagram.com/gokko5club/

♧ YouTube: https://www.youtube.com/@gokko5club/

♧ X: https://x.com/gokko5club/

♧ Recruitment Site: https://gokkoclub.jp/recruit/

♧ Vertical short-form drama app 'POPCORN': https://popcorn-drama.go.link?adj_t=1sfy5zhz

'Calpis' and 'CALPIS' are registered trademarks of Asahi Beverages Co., Ltd.

FACT BOX

Source: PR TIMES
Category: Partnership