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    Younger Sister Training System – My Younger Sister’s Growth Is the Key to for Me to Become the Strongest in the Other World! Forum

    About the Novel
    Ren Tsukishiro, an ordinary university student, found himself reincarnated in another world. There, he encounters his lovely younger sister, Lilia Sylphid. The mysterious system recognises her as his ‘younger sister’, without her growth, he cannot grow up either. As he struggles... See more
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