お兄ちゃん、朝までずっとギュッてして！
The protagonist, an older brother to four sisters, suffered from severe asthma as a child. As a result, it became a daily routine for him to sleep with one of his sisters. One day, his parents, who are also researchers, ordered him to participate in ...
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koiya reached 18063 / 75000 characters on Thu Jan 02 2025
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