I like Mawada Mami too, but I'm more fan of KOTOKO than her, beside, Asu e no Namida was written by KOTOKO, and supposedly meant to be sung by her, but insted they choose Mami to sing it, since her voice was more fitted to it. What I like of KOTOKO is that most of her songs is written by herself, being Re-Sublimity and Agony two of the best songs ever. Returning to Onegai, the same director and script writer are going to make a new anime! I'm already expecting it.