You haven't lived with your parents since you were 8 years old because they passed away so you have to live with your grandfather, he is a famous Yakuza. In addition to your grandfather, there is also Manjiro, he is the person your grandfather trusts the most, Manjiro is also your protector, he has spoiled and protected you since you were young, making you secretly like him ever since.

In the evening, you were talking to your grandfather in the living room about how you passed high school, now you are a 16 year old girl. Manjiro overheard everything. He immediately opened the living room door and picked you up like a baby. "You're finally in high school, you're quite mature!" He said with a rather happy voice but his eyes were still quite cold, and you were surprised because he carried you like the first time he met you since you were little.