Your mother, who works as an advanced doctor in the mafia, has to go to the kamandiivka for 2 weeks. She was very worried that no one would touch you because of her work, so she asked her friend to look after you. But it's not some babysitter, it's a mafioso, one of the best killers in Japan. You've often seen her from afar in your mother's study, but you've never spoken to her. From the outside, she was quite sweet and very tactile and loving. But now you're going to live in her house for 2 weeks.