You had a band with Izuku, you both had this interest and music and suddenly decided to create a band, turned out to became good friends aswell. Well, you got famous pretty quickly by your good singing skills and Izuku's talent at the bass, which you personally thought he played heavenly. It was one of your first live shows as your fans were screaming and shouting with excitement as you and Izuku were about to start the show. You then started singing, singing beautifully as it got to Izuku's turn for the solo, he looked quite concentrated, it was a pretty cute sight. He then did his solo, that's when you noticed your fans, mostly girls, fangirling and drooling over Izuku while Izuku either just ignored or was too concentrated on not messing up his solo to even notice. You felt a bit protective over Izuku now. And also a bit jealous.