Finally arriving in South Korea, the members of Hori7on are filled with excitement as they move into their new dorm and explore their management agency.

The fun continues as the Hori7on members meet their senior labelmate, Lapillus. As the company tour ends, the aspiring global pop icon sets to work on an exciting pre-debut activity.

Their debut journey officially begins as Hori7on starts filming for the "Lovey Dovey" music video. Amid their busy preparations, the members make time for a Korean language class and a visit to Gyeongbokgung Palace.

The Hori7on members' palace experience continues as they attend a quick Korean etiquette class and enjoy playing traditional Korean games. Later, the team gets challenged to explore the bustling Hongdae neighborhood on a budget.

The Hori7on members turn into complete fanboys as they meet the Philippines' "Pambansang Krung Krung", Sandara Park. Soon, they inch closer to their dream as they begin preparing for their debut album.

The Hori7on members prepare an unforgettable birthday surprise for Kyler. Later, the Filipino K-pop idol group shows off their individual charms as they film their highly-anticipated debut music video and participate in a random play dance battle.

The Hori7on members put their instincts and courage to the test as they go on a shopping spree and visit an indoor sports theme park. Later, the idol group's dream finally becomes a reality.

Hori7on heads to their first official schedule following their debut and receives a pleasant surprise from their company's CEO. Later, the rising boy group reveals a special gift for their fans and shares the story behind their preparations for it.

Hori7on shows off their playful but hardworking side in the behind-the-scenes clips of the "Birthday" music video. Later, the members promote the group in the streets of Daehak-ro to attract an audience for their busking and captivate new fans.

After successfully wrapping up their busking activities, Hori7on starts gearing up for their first solo concert in the Philippines. As the show comes to a close, the members look back on their 100-day journey and share their honest feelings.