Onegaishimasu, Reni-chan, I would like to suggest three songs:
-- FUKAI MORI by Do As Infinity (from "InuYasha")
-- EVERY HEART by BoA (from "InuYasha")
-- RASPBERRY HEAVEN by Oranges & Lemons (from "Azumanga Daioh")
Arigatoo and New Year's Blessings!
Your grateful friend & fan,
(from Metro Anime)