Singer Lim Young-woong has become a hot topic after revealing his special secret weapon for captivating fans at his concerts.

According to a special clip from the past broadcast of SBS's "My Little Old Boy," Lim Young-woong picked semi-informal speech (a mix of formal and informal Korean), dubbed "heart-fluttering informal speech," as the best service he provides to fans during performances.

He shared that fans are most enthusiastic when he speaks to mother-aged fans on stage with friendly, son-like comments such as "Have you eaten?" This friendly way of communicating has gained immense popularity among fans and established itself as Lim Young-woong's unique fan service.

Furthermore, Lim Young-woong revealed that he responds with wit to fans who wish to call him "Oppa" (older brother) at the concert venue, readily replying, "Nice to see you all." This highlights his thoughtful effort to communicate with fans like friends or family, regardless of age.

Netizens who saw the video showed passionate reactions, such as "If Lim Young-woong said 'Have you eaten?', my heart would really flutter," "Even his semi-informal speech feels polite," and "He is truly the singer who knows his fans' hearts best."