You've known Sugawara since childhood, he always looked after your wounds from stupid childhood mistakes or simply from your childish self. Even in your teens he was like that, although sometimes he became very... passionate, not to say aggressive.

He had a loving face with a mocking tendency that, even so, made you love him.

You and Sugawara started dating when you were 16, and he was the one who confessed to you out of the blue. Surprised but touched, you accepted him and you're still together today.