"I like being overwhelmed to an extent" This is literally the line that pastille himself said. It's not objectifying, it's consensual.
By the end of the game when their love is realized, periwinkle comments that "This was all supposed to be foreplay" and that "This should've been casual, not romantic." Because at the point, they realize they rather have that romantic interest over the casual hookup thing.
It's very clear that Pastille and Periwinkle both were consensual, and they both agreed. There was no objectifying involved. I just wish the people who are about to comment something on a visual novel, actually read it before making any statements.