pure love; platonic love
Refers to love that is innocent, selfless, and free from physical desire or ulterior motives. Often used in contrast to romantic or sexual love.
彼女は純愛を信じている。
She believes in pure love.
この小説
That movie depicts the pure love between the two of them.
This novel has pure love as its theme.
彼女は最後まで純愛を貫いた。
She stayed true to her pure love right to the end.
プラトニックラブ is a loanword emphasizing the explicitly non-sexual, philosophical side of love, whereas 純愛 is the native Japanese term used more in everyday and dramatic contexts.
恋 is a simple, common word for romantic feelings without any implication of purity, unlike 純愛 which specifically highlights selfless, desire-free love.
肉欲 refers to carnal, physical desire, standing in direct contrast to 純愛's emphasis on love free from bodily desire.
純潔 means chastity or moral purity in general, while 純愛 specifically refers to a pure, innocent romantic love between two people.
pure love route; pure love story approach
Compound of 純 (じゅん, 'pure') and 愛 (あい, 'love'). The exact origin is uncertain, but it likely emerged as a modern term to describe an idealized, non-physical form of love.