My Friend's Little Sister Is Only Annoying to Me

Synopsis

Ooboshi Akiteru values efficiency over relationships and has no interest in romance, yet his peace is constantly disrupted by Kohinata Iroha, his friend's relentlessly energetic younger sister who invades his space with pranks and playful seduction attempts. To everyone else, Iroha appears as a well-mannered honor student, but around him, she transforms into an insufferable pest determined to crack his indifferent facade.

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