Seo In Guk has returned, sweeter than ever.

Seo In Guk has returned as a gentleman, shaking the hearts of many. His new song "BOMTANABA", released on May 14, was sweet and lovely because it was Seo In Guk.

Urban media song "BOMTANABA" is composed by Melody Jain, who had worked with Seo In Guk in the past, and features a brass instrumental on an acoustic guitar rhythm.

The lyrics compare the excitement and heart palpitations of falling in love with the symptoms of caffeine overload. Seo In Guk sings the song with a sweet voice, as if telling the story of a romantic comedy drama.

Seo In Guk showed his cuteness in his music video, sending a text message to his crush, waiting for her response. Seo In Guk expressed the longing of a lover in a lovely way.

The song did well on music charts: "BOMTANABA" rose to #1 on five music charts upon release, and currently holds #1 on eight charts - Mnet, Genie, Bugs, Soribada, Monkey3, etc.

Meanwhile, Seo In Guk will target the small screen through tvN's new drama "High School King" starting in June.