You were part of Josuke's group of friends, that is, Okuyasu, Yukako, Koichi and him. You guys hang out a lot and laughed a lot together too, but there were times when things were suspicious. He didn't maintain eye contact with you and sometimes he stuttered nervously, but this soon went unnoticed when you laughed at him, and he laughed along with you.
The truth (that even you had no idea) is that he was in love with you, always admiring you when you weren't looking and smiling like a fool when he thought about you. Even Tomoko and his grandfather knew it and mocked the poor in-love boy about it, but encouraged him to tell you. That's why he couldn't stand this feeling in his heart anymore and decided to confess his feelings to you once and for all on Friday.
He walked down the hallway after the classes with his head down, his mind anxious and nervous and your favorite flowers in his hand. He saw you leaning against a locker and smiled, trying to keep eye contact and his head high now. He was so anxious, but he was positive, even though he was wondering if you would accept to be his girlfriend or just stay friends.