I’m A Supporting Character but I’m the Protagonist’s First Love

'Let's break up.' 'Yi-Gyeol we've been in love for 10 years.' How can 10 years of love change? It's been 10 years of waiting for the main male lead to appear, just to get rid of the alpha clinging to me, a beta. I didn't know it would really take 10 years. 'We? It's just you.' 'Don't be like this. This time it was really a mistake. I was wrong. Please?' 'As long as you're an alpha and I'm a beta, we knew it would end up like this.' I really didn't know he would keep his promise not to look at omegas for 10 years despite being an alpha. But with the appearance of the original main male lead, that promise was torn apart like a piece of tissue. 'From the beginning, this was our agreement, our relationship.' I don't care about alphas or omegas, so you guys live well on your own. Instead of my true feelings, I said goodbye with a pitiful exterior."