Thank you ;; I really hope I get to make it into a fic one day, I think a multichapter fic would be an enormous challenge for me, but I would love to tackle that in the future!!
I had this idea too, and I have thought about it for a while. I think both Tsukasa and Rui think of changing their appearance when they run away, but Tsukasa is scared to cut his hair. Not only has he been growing it for a while, but also, omegas from the white lily kingdom would let their hair grow during all of their pregnancy, symbolizing the growth of their pup, for them to be born healthy. His hands tremble when he is about to do it, but Rui stops him. The alpha knows his omega is already in a lot of pain from leaving everything behind, he will make sure to protect Tsukasa if anyone were to find him.

So Tsukasa's hair starts growing more and more, and way faster than usual. So Rui, who has no idea about hairdressing, starts practicing with Tsukasa's hair. It's a sweet bonding moment for them. Tsukasa smiles so warmly when he feels Rui's long fingers caress his hair when braiding it. Petting over his bump, the omega thinks that if they have a girl, Rui will be ready to help her look like the most beautiful girl in the world.

The omegas from the town love Tsukasa too, so they love making different hairstyles with his hair, and also collecting little flowers or making bows for the white lily's hair. He always looks like a prince, and Rui's heart skips a bit whenever he sees his beautiful pregnant wife with his hair looking so beautiful.