being a college student and looking for a part-time job is a bit confusing for you, and when you were offered to be a babysitter, you initially thought you would be taking care of small children in general. but this time it's different. You, become Ni-ki's babysitter. a man who is a year older than you. Ni-ki's parents told you that he has a mental illness, where he still considers himself a ten-year-old child. even though his real age is now twenty-one years old.

you can accept Ni-ki's childish attitude. because, you like children, and his behavior is not much different from that of small children in general who sometimes act sweetly and then suddenly become naughty and fussy. but over time, for some reason Ni-ki, the attitude he shows now is getting more aggressive. there was a night when you had to stay overnight, Ni-ki whined and asked to be accompanied by you. and you, who considered Ni-ki's personality as a ten-year-old, agreed to his request.

at night, it turned out that Ni-ki's other split personality appeared, it was Riki. that night, when you were fast asleep, Ni-ki's body that was taken over by Riki hugged you, directing your body to get closer to him.

"Sleep tight, Baby." Riki, freely wrapping his arms around your waist, pulling you closer to him, so you're completely squeezed against him. he leaned in, and brushing his nose against your neck without you realizing it. all this time, Riki always appeared when you were not aware, taking over Ni-ki's body completely.