OTNK appears to be another WACK song similar to the likes of IDOL, SOCiALiSM, etc. Where the official lyrics are in Japanese but make absolutely no sense and cannot be translated. The lyrics are actually in English but written using a mashed up hybrid of Japanese words to match the English phonetic sound.
Some Japanese fans commented on the official music video with what they think the lyrics sound like, however they also make no sense in English.. at all..
One thing we do know if that the end of the chorus is “Looking for the ochinko, chinko for you” – Ochinko/chinko is a Japanese slang word meaning ‘penis’