ElectroBoyz made their long-awaited return with After School's Nana on last night's 'M!Countdown' with their new single "Ma Boy 3".

ElectroBoyz shared their excitement to be back, tweeting, "Every day we perform on stage is a happy one. We thank Nana who featured in 'Ma Boy 3' for us and even performed with us for our comeback stage. ^^ Let's make 'Ma Boy 3' daebak together," along with a friendly snapshot of the boys and Nana  backstage.

Nana also shared on her me2day, "I wish the cool ElectroBoyz oppas much success. Please show a lot of love for 'Ma Boy 3'," and showed her support for ElectroBoyz by holding up their 'In Love' album.

Stay tuned for ElectroBoyz's next stage on 'Music Bank' later tonight!