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Brothers Conflict manga focused on Natsume. Natsume, who works at a game company, learns of his new step-sister the day of his mother's wedding. Just as he starts interacting with the game loving girl, he finds out the feelings the other siblings hold towards this girl…
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Brothers Conflict manga focused on Yuusuke and Fuuto.
Source
Brothers Conflict manga focused on Tsubaki and Azusa.
Sequel
A sequel of the spin-off comic based on the episodes from the second season.
Parent Story
After her dad remarries, Ema moves into the Asahina Family House and acquires 11 brothers. Ema intended to live peacefully with them as a family, but the sudden appearance of a girl in an all male household causes discord. Going on with their lives, the brother’s feelings for Ema change and the start of a same roof forbidden romance begins.
Parent Story
Second season to the Brothers Conflict light novels. Here Ema is a university student.