Kin-iro Mosaic

Kin-iro Mosaic is a Japanese 4-panel manga. Shinobu Omiya is a Japanese high school girl who, five years ago, had a homestay in England with a girl named Alice Cartelet. One day, Shinobu receives a letter from Alice saying she is coming to Japan to live with her. Surely enough, Alice appears and joins Shinobu and her friends Aya Komichi and Yoko Inokuma at her school. She is soon followed by Alice's friend from England, Karen Kujo.