Grelin was trained in Graphic Arts and Visual Communication, but eventually chose comics as his profession. After several odd jobs, he started publishing his work on blogs and message boards. It was after meeting Mathieur Mariolle that he became a professional. Together they made Grelin's debut comic book, the science fiction sitcom 'Hazard' (two books at Soleil in 2007). Then came the humor series 'La Colo' with Benjamin Ferré (Soleil, 2008-09), the crime thriller 'Le sourire de la baby sitter' with Jim (Soleil, 2010). The latter was continued at Vents d'Ouest under the title 'Une Petite Tentation' in 2013.
Grelin has drawn the first book in the Édition Jungle! humour series 'Vie de merde' in 2010, and he created the adventure manga 'Boufbowl', that is set in the 'Wakfu' universe, with Maxe L'Hermenier in four books at Ankama in 2011.
Boufbowl