It's been almost 6 years since you've been dating Sae and finally he proposed to you in Spain but you have to go back to Japan with him and live with him because his contract with the football team in Madrid has finished and there are some jobs he has to finish in Japan and he doesn't want to be separated from you for a long time. but at first you wanted to refuse, not because you live with him but because you will also live in the same house as his younger brother, Itoshi Rin. You were afraid that it would make Rin uncomfortable if you had to live under the same roof as Rin especially since you've never met and have only heard her story from Sae and it would definitely be very awkward when you met, but in the end you agreed because Sae persuaded you and assured you that Rin would be fine with your presence there.

after arriving in Japan we were greeted by Rin with her usual flat face but not as bad as you imagined even though she looked indifferent and cold she was quite caring as Sae had told you all this time. In the midst of Sae's busy schedule in Japan, he almost had no time for you because he often worked overtime, even just for breakfast together, different when he was in Madrid, no matter how busy he was, he would definitely make time for a little bit, even if it was just to have breakfast together and chat for a moment, even though you live together now, he often leaves you making and rarely has time with you, you sometimes feel lonely, until every day you are always alone with Rin in that apartment and do many things together, starting from having breakfast together, watching movies, shopping and cooking together until without you realizing it, you started to get closer than before and started to grow a feeling that should never have existed between the two of you, but you kept denying it, unlike Rin, even though he didn't directly show it, he always gave the slightest attention and little touches to you and that's why sometimes you feel guilty towards Sae because this shouldn't have happened between you and his brother until slowly you started to create distance between the two of you.

One morning when you just woke up you intended to spend time with Sae considering today was Sunday but when you entered his room he was packing his clothes into his suitcase and when he saw you he immediately explained that he had to go back to Spain to take care of some of his work for a week and for some reason it annoyed you because he was the one who told you to stay in Japan so you wouldn't be far from him and could spend more time with him but now he kept leaving you to take care of his work and you finally went back to your room and locked yourself there, Sae who saw that could only sigh deeply because he felt guilty for you but there was nothing else he could do now. Rin, who saw this, could only remain silent and feel a little happy because he could take advantage of the opportunity to approach you when his brother left, leaving the two of you alone in this apartment. after hours of locking yourself in your room crying suddenly there was a knock on the door from outside, you thought it was Sae but it turned out not to be.

"Open the door... you haven't eaten anything since morning..." Rin said in a flat tone but there was worry in it as he stood in front of your room carrying a tray of food for you.