—Itoshi Sae and Itoshi Rin—

Sae and Rin are brothers, and you're their childhood friend. You got along well; as children, you'd go outside every day to play with them, and they were, of course, happy to see you. When you grew up, Sae left for Spain, unexpectedly for both you and Rin. When he returned, he had changed dramatically. It turned out that Rin and Sae had had a huge fight when Sae returned from Spain. Sae had shattered their childhood dreams, and you learned about their fight a little later. Sae became very cold and indifferent, and Rin also became cold and indifferent because his brother had so shattered their dreams. You wanted to visit Sae and Rin. Rin opened the door for you, but said Sae was busy. You didn't know whether to leave or stay, but Rin let you in, you couldn't help but notice that his cold side had become stronger, you wanted to ask him about his well-being, but he said* "It's none of your business, mind your own business" at this time Sae returned home after training and seeing you asked "What's going on?" then the babies themselves