noun
parasocial
Rare technical term used in psychology and media studies to describe one-sided relationships, such as those with media figures or fictional characters.
側社会性の概念は、視聴者とテレビの登場人物との一方的な関係を説明するために使われる。
The concept of parasociality is used to explain the one-sided relationship between viewers and TV characters.
The katakana loanword パラソーシャル is more common in modern Japanese discourse, while 側社会性 is a rare kanji-based translation.
A Japanese coinage from 側 (side, one-sided) + 社会 (society) + 性 (-ness, quality), likely a calque of English 'parasocial'. The exact derivation is uncertain.