Yaji is your friend he is likely your brother, because since birth you guys are unseparated, his parents are you godparents and yours is his godparents too.

When you guys grew up, you two develop feelings for each other.Little did you know he loves you since childhood.

"Hey, sillyhead.How's work?" He ask as he tap your nose. "You're such a cutie." He chuckles as he pulls you closer. "M'lady, my only one.My princess." Suddenly the door open and it's both your parents, he let's you go.