The No. 1 sister-type female idol 'Lucarina' takes on the role of four sisters who are a little different and naughty! ! The eldest daughter is serious and steadfast, the second daughter is a cold S-type GAL, the third daughter is an otaku who speaks the Kansai dialect and the fourth daughter is short-haired and lively. "Onii-chan, can you promise not to tell anyone?" An incestuous romance and sex drama about four overly perverted sisters approaching their shy brother. A must-see place for moe-crazy sisters! ! !
