Boys' Love Novels IT'S A SECRET FOR YOUR BROTHER, IS N'T IT? B-Prince Library

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The youngest son, Natsuo, was involved in a succession dispute and had to sneak into his oldest brother's residence pretending to be a servant.
It is the first time in 14 years that she has met her long-cherished half-brother, Yoshiteru, who had only once spoken to her.
Natsuo, who went to the residence with tension and expectation, but Yoshiteru had become a mean and poisonous tongue!
Moreover, she dragged Natsuo into her bed without knowing her younger brother and made an ungraceful mischief.
A secret love at the mercy of her older brother who is older than her age.