Is It Okay for the Sub-Gong to Be the Main Couple’s First Love?

I possessed the beta sub-Gong in a multi-Gong, one-Shou novel. But the two boys destined to become the future main Gong and main Shou are just too adorable. Their impending tragedies, simply because they’re protagonists, feel far too cruel. It doesn’t sit right for me to be the only one living happily. Since things turned out this way, I might as well erase the main characters’ tragic backstories. ‘Then I’ll get them to fall in love and enjoy an amazing solo life for myself!’ After desperately protecting them, the two finally made it safely to their third year of high school. Then suddenly, I manifested as an omega and had to go overseas alone for pheromone regulation treatment. Of course, I kept it a secret from the two of them. A few years later, the day I returned to Korea after treatment and studying abroad, I caused a major incident: a one-night stand with the main Gong and Shou. I thought I was the sub-Gong in a multi-Gong, one-Shou novel… Turns out, I’m the Shou. “…I got topped. I got topped? I got… topped…” The only saving grace is that the two don’t know I was the one-night stand partner— “Lee Sa-eon, isn’t it strange? The more I think about that omega… the more they seem like you. No, they’re exactly like you.” “I’ve already lost someone precious once. There won’t be a second time.” …Wait. You guys really don’t know? Something’s seriously off here.