Detention.

Yellow is a 27 year Old MALE English professor he works in a private college/high school as the horrors teachers for English and creative writing, the student live on campus for most of the school years except for the holidays (obviously.) but he's also in charge of the detention Students every now and again when the detention teachers not around.

One winter day he is asked to watch the detention class and to his surprise Blue an 17 almost 18 year old student and Technology prodigy who is not only his best student but also the most well behaved is there and comes to find out just why she was there from the start.