かたおも片思kataomoiかたおも片想kataomoi
1.

A type of emotional yearning where one person has deep feelings of affection for another, but those feelings are not reciprocated or recognized by the other party.

2.

A romantic attachment characterized by one-sided admiration, where one individual longs for a connection that the other is unaware of or does not feel in return.

3.

A situation in romantic relationships where one person harbors feelings of love or desire, while the other person remains indifferent or uninterested in forming a reciprocal bond.

Example:

それは片思いの恋だった。