Recently, Olltii shared screenshots of his group chat with fellow rappers including Block B's Zico, Young B, Hangzoo, and more via his Instagram story. The conversation regarded American artist Nicki Minaj. 

Olltii shared a photo of Nicki Minaj's boyfriend Nas and mockingly texted, "Okay~~ It's been awhile. The reason I'm here is because~~~ I don't know what to say about Nicki Minaj's ass. I think something is stuffed in it but hmm,, I'll reveal it here for the first time."

Zico and Hangzoo responded with laughter, texting, "lolol"

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Young B also texted, "I don't know about Olltii hyung's rap but he is really funny lol." To this, Zico replied, "F*ck. He said he doesn't know about his rap.. Hong Won ee..."

The rappers' conversation became controversial as it seemed to broach on sexual harassment toward Nicki Minaj. In response to netizens' criticism, Olltii uploaded posts of apology. The rapper apologized for sharing content on his Instagram story with offensive jokes, and also explained that his fellow rappers laughed in response without thoroughly reading over his texts, as he often makes useless jokes. 

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A post shared by ?? (@olltii) on Nov 28, 2017 at 6:42am PST

Ollttii also apologized to Nicki Minaj. He even tagged her and stated, 

"I am so sorry and I deeply apologize @nickiminaj - Dear Ms.Nicki Minaj 

Hello. I'm Olltii, a rapper from South Korea. I posted a sexist picture of a conversation I had about you on my Instagram story. Initially, and stupidly, I did not realize that I was wrong in doing so.. it was sexual harassment and I was ignorant on how big of a mistake I was making. I completely acknowledge that there was discrimination and aversion displayed toward women on my part. If you ever see this message, I sincerely apologize for any inconvenience or pain this may have caused you. This will never happen again. I will continue to reflect and think more deeply before acting. Again, I want to say I am so sorry."