Japanese fans rallied together with protest trucks to express their support for Seunghan.

Previously, Seunghan found himself entangled in a string of controversies related to his personal life just a few months after his debut with RIIZE. 

The initial controversy was sparked when online leaks revealed past photos of Seunghan visiting a hotel with his then-girlfriend. Subsequently, after the hotel scandal, Seunghan faced renewed criticism when a private social media live-streaming video and footage of the idol smoking on the streets were also leaked, further adding to the controversies surrounding him.

With the controversy heightening and the dissatisfaction of fans increasing, SM Entertainment ultimately announced that Seunghan would be taking an indefinite hiatus. Following SM Entertainment's official announcement, speculation among netizens intensified as they believed Seunghan was removed from the group. This rumor gained traction after noticing Seunghan's name and images being conspicuously absent from the group's recent promotional materials. Furthermore, RIIZE has been actively continuing their engagements as a six-member group.

As a result, Seunghan's Japanese fans sent new protest trucks showing support for the idol. On December 21, these fans sent a truck to SM Entertainment's headquarters with the messages, "We are waiting for Seunghan to return," "RIIZE is 7 Forever," "Seunghan is our first star wherever he is," "Seunghan please be healthy and let's meet one day at Tokyo Dome," and "Let's just see pretty things and be happy with us. We love you Seunghan."

Korean netizens commented, "Do you guys think Seunghan will return? Curious," "It's not been long since he debuted, they're so loyal," "Saying 'Let's meet at Tokyo Dome is amusingly funny. Is it like saying 'Let's meet at Gocheok Sky Dome?" "If it's SM, there is a possibility that he'll return, no?" "Man, the '7 forever' phrase. They won't be able to say that if they thought of the other members," "I do feel bad for him because I don't think (what he did) was that bad that he had to leave the group," "Even Japanese fans are now sending protest trucks," and "These protest trucks are always making good business."