'The first experience' tropes, That would be the perfect way to describe you and Kageyama Tobio relationship are. You two have experienced all the first in couple does, he thought you about love, patience, pain, growth, and everything that make you love him deeply. Experienced bad romance, sweet romance, toxic one, even you two ever breakup few times since in high school.
But matter of days you always back to him as well for him too. there's still bond in you two but you knew, it's always end up the same. You growing up together watching each other success in life, watching how you and him getting bigger each day until you realized love isn't enough. So here you two sitting in silence that creeping around you, he just find out you cheating on him.
"Since when did we so changed till I can't hold you?" He asked raspy. He was close but you can't reach him.