SW-830 - 巨乳なのにUBUな妹達を心配したエロギャル姉さんが男に慣れさせようとして妹達に見せつけSEX！？ ムラムラを溜め込んだ妹達に姉さんがセフレを送り込んだら戸惑いながらもしっかりエッチな展開になっちゃいました！！

The eldest sister's character is so erotic that the contrast with her younger sisters is hilarious. She’s curious about sex but acts like she’s shy, so it’s a bit complicated. Still, the idea of the sister sending over her sex buddy—I mean, how many guys does she have? But from a guy's perspective, I'm not complaining! The sisters finally awaken and turn into sex-crazed girls at the end, but... it’s so disappointing that there wasn't a 3-on-1 orgy scene with all three sisters! Even if it started as just showing off, they achieved the goal of getting used to men, so they should've all joined in... It feels incomplete.