A person with an unusually
strong and
probably sexual attachment to their
sister. One of the numerous Japanese "complex" portmanteaus that indicate real-life creeps and fictional doujinshi protagonists.
Siscon as seen in "Rabu Rabu Eien <3"
Ani: Natsuko, I... I've always been watching you...
Imouto: Oh Oniichan! I love you too! Let'
s have sex!
Siscon as seen in Real Life
Ani: Natsuko, I... I've always been watching you...
Imouto: Get away