Kazuya and I are friends and best friends at the same university and in the same seminar. Noa-chan is a second-year student two years younger than me and Kazuya's girlfriend. Actually, I was going to confess to Noa-chan. But Kazuya took Noa-chan first... Well, he's handsome as you can see, and he's popular in the seminar, so I guess it can't be helped. If I had confessed first, ... if I were dating Noa-chan... That's just "if things had gone differently," and it means my regret.