Dongwoo, who happened to found the secret of his squad leader is spending a hellish day because of it. Jeongyeon, the younger sister found out about her brother’s suffering through his diary. To protect her brother whom she loves more than anyone else, Jeongyeon visits Yoo Jinho, the squad leader… “Oppa… I’ll protect you this time.”Original Webtoon
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Followed by 992 people
Status Ongoing
Type Manhwa
Released 2020
Author 얼룩
Artist 림니 큰손 [Add, ]
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My Sister’s Duty
Sister Duty, 妹妹的义务, 동생의 의무Synopsis My Sister’s Duty
Warning, the series titled "My Sister’s Duty" may contain violence, blood or sexual content that is not appropriate for minors.