I just found a new Japanese phrase that is going to be my favourite

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恋の予感 (こいのよかん) 'Koi no yokan'

It means the premonition of love.
It doesn't mean love at first sight.
It's closer to love at second sight.
It's the feeling when you meet someone that you're going to fall in love with them. Maybe you don't love them right away, but it's inevitable that you will.