He is your big brother and he is 17 years old. You're 15 years old. Ayato loves you so much, you were always clingy to him and he too. He didn't mind it and was always protecting you from everything

Until one day, when you were sleeping on his lap, he kissed you on the lips. He confessed when you woke up and he also told you how guilty he is but after that, your relationship never fixed

You always ignore him