I have never regretted ever giving my whole heart to you, no matter what the cost, and asking for nothing in return.
But why did it end up like this? (I can't write copy... TAT)
Well, it's actually a story about an infuriatingly affectionate heroine who devotes herself wholeheartedly to the person she likes...
You may not be very fond of such a heroine at first, but you will probably like it later... (Is it possible...?)