Fair warning: this may very well be too silly for its own good.
Luke set his book bag down and haphazardly dropped his coat on top of it, earning him a stern look from his grandma as she left the porch in favour of the barn. He gently opened the kitchen door and snuck inside. Sure enough, there was the man he loved; sitting at the table, immersed in a reader titled Semiotics II – Tropes as cinematic and television narrative devices. ‘Riveting stuff, I’m sure,’ Luke thought to himself before making his presence known. “Hey, Noah. How’s the studying going?”
Noah, who was in the process of highlighting a section on the page, looked up at him. For a millisecond his face ghosted over with an expression Luke found hard to interpret, and then he collapsed into a fit of giggles, breaking the hallowed silence in a way that was as exuberant as it was uncharacteristic.
There was no stopping it. Every time it seemed the laughter subsided, Noah would glance at Luke’s puzzled face and erupt all over again, until he was so out of breath Luke started to worry a little. His boyfriend’s emotional restraint was legendary, and for the life of him Luke couldn’t figure out what was funny to begin with, let alone so funny it reduced Noah to this.
A glass of water lovingly placed in front of him did the trick. Noah at long last calmed down and took a big gulp of the cool liquid as he settled back into his chair. “I’m sorry, Luke,” he said, putting the glass down on the table. “I didn’t mean to freak you out. But I was studying for my advanced semiotics final, and just as I was working on this particular trope you walked in and it hit me like a ton of bricks.” Noah turned the reader towards Luke, and directed his attention to the passage he had been highlighting.
This time it was Luke’s turn to laugh out loud. He crossed the short distance between them and unceremoniously parked himself on Noah’s lap, immediately feeling the brunet’s strong arms encircling him. “Glad to be of service, Bubby,” he chuckled.
Noah stopped nuzzling Luke’s neck and kissed him, a deep tender kiss that conveyed all the love he felt for the beautiful man he was holding. He didn’t want to study anymore. He had Luke at his side, and therefore better things to do. He gently pushed Luke off of him and stood up. “Wanna go for a walk around the pond?” he asked, stretching out his arm in invitation. Luke nodded, grabbed Noah’s offered hand and followed him outside.
The now empty kitchen returned to its former state of quiet solitude. Noah’s reader lay forgotten on the table, still open on the partially highlighted segment that had caused his meltdown.
Every once in a while, you'll come across a character who has a very strong and often very sudden connection to a major character of the same sex. This new character will be very physically attractive (which will be described at every possible opportunity), and their other personality traits will precisely appeal to the established character, to an almost Relationship Sue-ish level.
Congratulations! You have just met a Closet Key.
A Closet Key's primary purpose (at least at the outset) is to indicate to the audience, and sometimes to the established character they meet, that the said established character is very, very gay. Fortunately, the Closet Key is usually gay too, so the relationships at least aren't instantly tragic. Also, it is not necessary for either character's sexual orientation to be explicitly mentioned in the text; the trope can be used as a method of "gay coding". Of course, this ambiguity leaves room for much debate.
The ‘Closet Key’ trope can be found at tvtropes.org, a website that is both informative and delightfully witty. There’s a section devoted to ATWT with lots of tropes pertaining to Luke, Noah, and Reid. You can find it here: