Tensei-saki ga Nuigurumi demo Saikyou deshita is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Ralph, a legendary sage, has used up all of his power to seal the Demon King and has been reincarnated 300 years later. However, he finds himself reincarnated as a stuffed animal. He and Tiana, a beautiful girl who wants to be a wizard, decide to become the strongest again, but an unexpected evil hand is closing in on their peaceful territory. So a fantasy with infinite cuteness, full of courage and magic, begins!