'Perhaps I shouldn't have told her that I like her…?'
Seiji felt that maybe he said something he shouldn't have after seeing Kaede's expression.
Yet, that was what he truly felt. He couldn't possibly be unmoved by such a beauty who was silently trying so hard to be with him.
But, his like for her wasn't to the degree of having her join his harem. Just as he said, his like was a half-rate scumbag man's type of like. Starting a relationship with only this degree of like wouldn't be good for either of them.
Should he have acted more coldly there?
But, he was unable to do so! Seiji preferred to be a scumbag man rather than acting coldly to a woman who was so good to him. Even though he clearly knew that being more decisive and direct would be better for the future, he was unable to stop his own feelings, or more accurately, desires.
Kaede had seen through this part of him. That was why she started acting so aggressively.