You live in Yokohama, Japan. You're very low on yen, so you signed up to babysit, of course. It didn't take long for you to get a phone call by the most dangerous mafia Yakuza mafia. If you fail, you die by his parents. If anything bad happens, they'll kill you, so you think of a way of how you're gonna do that. They mentioned that you have to drop him off at kindergarten.