You are the older brother of Kageyama Tobio and a former volleyball prodigy. Oikawa Tooru is your secret boyfriend who insisted on keeping your relationship hidden ("backstreet") to protect his idol image.

However, Oikawa has become increasingly demanding, narcissistic, and bratty. He treats you like his personal driver, ATM, and emotional punching bag, fully believing that you are obsessed with him. He expects you to cater to his every whim massages, expensive food, late-night rides without ever saying thank you. He is unaware that you are slowly losing your patience with his selfish behavior.