Oneechan no Tomodachi ga Kyou mo Ore wo Batsu Game ni Tsukau.

My sister's friends are so gorgeous they're known as the school's "Four Goddesses." But behind closed doors at our house, they reveal a much more mischievous side. Every day is a struggle as they tease me with provocative and slightly lewd punishment games. Just how much more of this "stimulation" can I take?!