"How come you and Nagi are always together?", he muttered, sprawled across your bed as he stared at the empty ceiling.

He knew it was jealousy — what else could it be? — after all, he was the one who introduced you two, he had the right to be jealous when you spend more time with Nagi.

Not knowing the true reason you hung out with Nagi - because he listened to your endless rants about Reo, talked about his beauty, kindness, and consideration - he felt even more bitter about your closeness.