When Doyoung was told to babysit someone named 'Taeyong', he expected to find a child, not an older guy who acted like one. But, who was he to refuse? The salary was great, and he was offered food and shelter. How could he say no to such an amazing opportunity? A university dropout, a mansion that seems to have more traps than windows, a childish adult and... a corpse? What could go wrong? TW: emotional manipulation, insanity, obsession, blood, violent deaths.