妹とその友人がエロすぎて俺の股間がヤバイ / Imouto to Sono Yuujin ga Ero Sugite Ore no Kokan ga Yabai
#2. 茶髪ツインテールでユサユサ巨乳!? 妹の可愛い友人『莉子♡』 編 | Chapatsu Twintail de Yusayusa Kyonyuu!? Imouto no Kawaii Yuujin “Riko” Hen | Brunette, Twin Tailed, and Huge Tits!? My Little Sister`s Cute Friend, Riko Arc
Miu, a tsundere younger sister with long black hair and a flat chest.
Because of her dislike of studying, her math grades are plummeting!
His older brother, Kanata, is given the role of a private tutor by his mother in return for an increase in pocket money.
However, her younger sister, who is in the prime of puberty, refuses to be alone with her older brother.
After the two of them came together, the three of them decided to hold a study session together with her sister’s friend Riko!
Riko with brown hair and big breasts. She is super cute to boot.
Such Riko likes Haruta, who is good at teaching her.
With her devilish smile on her face, Riko always clings to Haruta’s body while she’s studying.
Her younger sister glares at her brother who is in a state of deredere.
All of a sudden, Haruta finds himself under pressure from both of them!?