HIGH4's debut song with IU "Not Spring, Love, or Cherry Blossoms" has achieved an all-kill!

Their song ranked at the top on the real-time charts for MelOn, Mnet, Bugs, Olleh, and all of the other big music sites.  

The boys took to SNS at this news to reveal their thoughts, uploading a picture of a letter that was personally written by all the members.  Leader Sunggoo, a close friend of IU, wrote, "I was really out of it the whole day yesterday.  Our company even threw us a surprise party so I was doubly touched!  I will work hard.  Ji Eun (IU), thank you so much and let's definitely see each other at the top."

SEE ALSO: IU reveals why she stopped checking social media messages

Myunghan wrote, "I can't believe we made an all-kill as soon as we came out.  If there is anything our fans want, leave a comment."  Alex wrote, "We got first place thanks to our fans," while Youngjun wrote, "One word, one word from our fans gives a me a lot of strength."

Congratulations to the boys on this achievement!

[Thanks to everyone who sent in tips!]