Seongho and Myeong Jaehyun of BOYNEXTDOOR appeared as guests on the TVING original "Transit Love 4." They appeared in episodes 3 and 4 of "Transit Love 4," released at 8 p.m. on the 8th, and were very active. Seongho and Myeong Jaehyun introduced their MBTI types as T (Thinking) and F (Feeling), respectively, and showed deep immersion in the cast members' stories.

In situations where the cast members' feelings conflicted, they expressed regretful emotions and continued to show vivid reactions by empathizing with the situations the cast faced. While deducing X, Seongho said, "My head feels like it's going to explode," and Myeong Jaehyun honestly responded, "Dopamine is rising," adding fun for the viewers. They are a team loved for their self-written lyrics, gaining attention for sharply expressing the psychology felt by lovers.

Regarding the subtle behaviors of the cast, Seongho analyzed, "It's not jealousy but a wounded pride, and they seem to be fighting the feeling of 'It's not jealousy,'" earning praise from the panelists. The panelists admired the two members' analytical skills, saying, "'Transit GPT' level. Their analysis is so good and cool-headed that I almost want to take their lines."

Additionally, Seongho and Myeong Jaehyun shared their thoughts on participating in the "Transit Love 4" OST. They said, "Lyricist Kim Eana wrote lyrics that fit well with the 'Transit Love' series. It feels good when our song plays in the situations we imagined." "Ruin My Life," sung by BOYNEXTDOOR, has been receiving great love, ranking on YouTube's trending music video chart from its release on the 1st through the 8th. This song is inserted into key scenes where the cast's emotions intertwine, enhancing immersion.

BOYNEXTDOOR is scheduled to release their 5th mini-album, "The Action," at 6 p.m. on the 20th. This album contains aspirations for growth and a bold mindset to become a "better me." The title track, "Hollywood Action," is a song that shows a confident and proud attitude like a Hollywood star. Expectations for their comeback are high.