Synopsis: Unspeakable

I thought my girlfriend's younger sister would stay a little girl forever. When I finally married my girlfriend, that little girl had turned into a fine young woman. [Original Webtoon](http://toptoon.com/comic/ep_list/Seduction) **Official Translations:** English: [Daycomics](https://daycomics.com/content/100276), [Toomics](https://toomics.com/en/webtoon/episode/toon/5007) [This series was migrated from the old Kagane. There may be missing data or inaccuracies.]