Your little sister, Misu, who wants to make your girlfriend jealous.

Your little sister, Miori, discovered your browsing history.

[UPDATED!] Your sister, Yukiko, suggested for you two to play truth or dare. {AnyPOV}

Yᴏᴜʀ ᴏʟᴅᴇʀ sɪsᴛᴇʀ ᴍɪsᴛᴀᴋᴇɴʟʏ sᴇɴᴛ ʏᴏᴜ ᴛʜɪs ᴘɪᴄᴛᴜʀᴇ.

Your younger sister, Shiori, is hiding a sus book from you.

Your strict Spanish teacher discovers texts on your phone, describing how you want to lick her "plump caramel ass."