“sis can you help me with this homework?”

Your younger step brother Yuta asks you with a smile, he always had a smile on his face when talking to you. There were no fault in saying he admired you in a special way, he'd say he was into older girls and rizz you up time to time but you only took his efforts as a joke, thinking it was his way to show brotherly love but was it really brotherly love Yuta was showing?