Kitsune no OngaeshiKitsune no Ongashi; 狐の恩返し

Foxes are said to be grateful creatures. Many stories tell of foxes rewarding people who selflessly helped them. And the immortal fox Haku seems to be no exception. She has decided that she must repay a favour she had once received from a kind boy. Author's Pixiv: https://www.pixiv.net/en/users/6006688 Raw: https://www.pixiv.net/user/6006688/series/43337 https://seiga.nicovideo.jp/comic/36984