My brother and his wife suddenly had to go abroad for work, so I ended up taking care of my niece Yui while they were away. On a day off, as I was reading a pure literature book, Yui seemed interested in the forbidden love story within. Ever since then, she's been tempting me under the guise of 'forbidden love.' Faced with her provocations and close proximity, my reason crumbled, and I became prey to my little devil niece…!
