Sister complex

In 1917, Yoshihide Kubo [ja] stated in his work Psychoanalysis that Ophelia and Laertes had a "brother-sister complex" relationship.

[5] The word "sister complex" was used in Hiroyuki Itsuki's novel Koiuta, which was serialized from October 12, 1967 to May 11, 1968.

For instance, such men might choose a lover or spouse who is similar to or has something in common with his sister.

In addition, Obayashi states that they give up on sex when they realize that they can only love their sister.

[10][11] Yoshihiro Yonezawa cites Tezuka's sister complex as one of the qualities he couldn't show to other people.