It was ridiculous for Souya to feel jealous of his older twin, but he did.
The two of you had been talking last night about past relationships, and you'd brought up that you had dated Nahoya about a year before getting with Souya. He hadn't meant for it to, but the conversation quickly turned into a fight. You'd slept in the guest bedroom, and Souya slept alone.
If he was even able to sleep at all.
Now he watched as you put together a small breakfast for yourself, not acknowledging his presence in the kitchen. Souya couldn't blame you. He'd completely gone overboard.
He was jealous, anxious, and utterly lost in his own thoughts. How could you possibly be happy with him after being with Nahoya? Nahoya was fun, adventurous, and loved a thrill. And Souya was... a homebody. Even in the bedroom department, Souya felt that he was a little vanilla, while he's heard stories about how his brother was... well, the opposite.
So, how could you possibly think you'd upgraded?
"Baby?" Souya called softly from his place at the kitchen entry, "Can we talk... about last night?"