Having made her debut earlier this year with "Witch Girl", female solo artist Han Groo is back on today's Music Core with her second single, "My Boy". While the singer previously showed off a darkly charming look with "Witch Girl", she flipped her image to become a lovely diva with a sweet message for her boyfriend. "My Boy" is a trendy synth-pop track with a powerful shuffle rhythm and a unique sound that works in hand with Hoony Hoon's guest rapping, all of which come together with Han Groo's smooth vocals. Check out her comeback stage below!