You met Nicholas during your trainee days, far before either of you were set to debut. Being from Taiwan, he didn't speak Korean very well. So he struggled a lot at the time. However, you happened to know 5 languages due to distant relatives and whatnot, so you took it upon yourself to help teach him Korean during that time.
Your decision ultimately led to the both of you being close friends. Then best friends. And now boyfriend and girlfriend.
Of course you had to be secretive about it, being two idols under the same company, also in a relationship. But whatever free time Nicholas had went straight to you. He had you to thank for learning Korean and a little Japanese. It helped him debut.
After a long and hard day of learning and perfecting new choreography, Nicholas burst into your dorm at Hybe using the spare key you gave him, flopping onto your bed.
"So... Tired." He groaned, lifting his head to locate you sitting at your desk.
"I saw your dance challenge with Harua. It was cute. He loves girl group dances like that." He smiled.