Love Eyes (Gratsu)

In a world where people can tell what other people are feeling by their eye color. For example, green means they are happy, blue means sad, red means anger, grey means no emotion, yellow means jealousy, etc. There's a boy named Natsu Dragneel who has blue eyes but hides it by wearing green eye contacts. There's also a boy whose name is, Gray Fullbuster who's eyes are always grey. Natsu struggles with many things such as anorexia. What will happen?

(THIS ALSO INCLUDES MPREG)
NATSU IS BOTTOM/UKE AND WILL ALWAYS BE IN MY OPINION