If Sanghyuk were to be asked to define beauty in one sentence, he would not be able to do it. But, if someone were to ask Sanghyuk to define beauty in one word, that would be easy. 

     His definition of beauty did not come in the form of a landscape or an emotion; it came in the form a person. A person whose dark bangs were swept elegantly across his forehead, whose smile could blind a person with ease, whose soft voice made Sanghyuk forget what he had been talking about. The word beauty in itself summoned this person's image and sent Sanghyuk daydreaming.

      His definition of beauty would always be Taekwoon.

This one is really short... but it's my OTP one of many (can you even have more that one?) and I like it, so I think it counts.